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Bluetooth: Search global l2cap channels by src/dst addresses
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / bluetooth / hci_core.c
CommitLineData
8e87d142 1/*
1da177e4
LT		 2 BlueZ - Bluetooth protocol stack for Linux
3 Copyright (C) 2000-2001 Qualcomm Incorporated
590051de 4 Copyright (C) 2011 ProFUSION Embedded Systems
1da177e4
LT		 5
6 Written 2000,2001 by Maxim Krasnyansky <maxk@qualcomm.com>
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License version 2 as
10 published by the Free Software Foundation;
11
12 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
13 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.
15 IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) AND AUTHOR(S) BE LIABLE FOR ANY
8e87d142
YH		 16 CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES
17 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
18 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1da177e4
LT		 19 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
20
8e87d142
YH		 21 ALL LIABILITY, INCLUDING LIABILITY FOR INFRINGEMENT OF ANY PATENTS,
22 COPYRIGHTS, TRADEMARKS OR OTHER RIGHTS, RELATING TO USE OF THIS
1da177e4
LT		 23 SOFTWARE IS DISCLAIMED.
24*/
25
26/* Bluetooth HCI core. */
27
82453021 28#include <linux/jiffies.h>
1da177e4
LT		 29#include <linux/module.h>
30#include <linux/kmod.h>
31
32#include <linux/types.h>
33#include <linux/errno.h>
34#include <linux/kernel.h>
1da177e4
LT		 35#include <linux/sched.h>
36#include <linux/slab.h>
37#include <linux/poll.h>
38#include <linux/fcntl.h>
39#include <linux/init.h>
40#include <linux/skbuff.h>
f48fd9c8 41#include <linux/workqueue.h>
1da177e4 42#include <linux/interrupt.h>
611b30f7 43#include <linux/rfkill.h>
6bd32326 44#include <linux/timer.h>
3a0259bb 45#include <linux/crypto.h>
1da177e4
LT		 46#include <net/sock.h>
47
70f23020 48#include <linux/uaccess.h>
1da177e4
LT		 49#include <asm/unaligned.h>
50
51#include <net/bluetooth/bluetooth.h>
52#include <net/bluetooth/hci_core.h>
53
ab81cbf9
JH		 54#define AUTO_OFF_TIMEOUT 2000
55
b78752cc 56static void hci_rx_work(struct work_struct *work);
c347b765 57static void hci_cmd_work(struct work_struct *work);
3eff45ea 58static void hci_tx_work(struct work_struct *work);
1da177e4 59
1da177e4
LT		 60/* HCI device list */
61LIST_HEAD(hci_dev_list);
62DEFINE_RWLOCK(hci_dev_list_lock);
63
64/* HCI callback list */
65LIST_HEAD(hci_cb_list);
66DEFINE_RWLOCK(hci_cb_list_lock);
67
1da177e4
LT		 68/* ---- HCI notifications ---- */
69
6516455d 70static void hci_notify(struct hci_dev *hdev, int event)
1da177e4 71{
040030ef 72 hci_sock_dev_event(hdev, event);
1da177e4
LT		 73}
74
75/* ---- HCI requests ---- */
76
23bb5763 77void hci_req_complete(struct hci_dev *hdev, __u16 cmd, int result)
1da177e4 78{
23bb5763
JH		 79 BT_DBG("%s command 0x%04x result 0x%2.2x", hdev->name, cmd, result);
80
a5040efa
JH		 81 /* If this is the init phase check if the completed command matches
82 * the last init command, and if not just return.
83 */
75fb0e32
JH		 84 if (test_bit(HCI_INIT, &hdev->flags) && hdev->init_last_cmd != cmd) {
85 struct hci_command_hdr *sent = (void *) hdev->sent_cmd->data;
1036b890 86 u16 opcode = __le16_to_cpu(sent->opcode);
75fb0e32
JH		 87 struct sk_buff *skb;
88
89 /* Some CSR based controllers generate a spontaneous
90 * reset complete event during init and any pending
91 * command will never be completed. In such a case we
92 * need to resend whatever was the last sent
93 * command.
94 */
95
1036b890 96 if (cmd != HCI_OP_RESET || opcode == HCI_OP_RESET)
75fb0e32
JH		 97 return;
98
99 skb = skb_clone(hdev->sent_cmd, GFP_ATOMIC);
100 if (skb) {
101 skb_queue_head(&hdev->cmd_q, skb);
102 queue_work(hdev->workqueue, &hdev->cmd_work);
103 }
104
23bb5763 105 return;
75fb0e32 106 }
1da177e4
LT		 107
108 if (hdev->req_status == HCI_REQ_PEND) {
109 hdev->req_result = result;
110 hdev->req_status = HCI_REQ_DONE;
111 wake_up_interruptible(&hdev->req_wait_q);
112 }
113}
114
115static void hci_req_cancel(struct hci_dev *hdev, int err)
116{
117 BT_DBG("%s err 0x%2.2x", hdev->name, err);
118
119 if (hdev->req_status == HCI_REQ_PEND) {
120 hdev->req_result = err;
121 hdev->req_status = HCI_REQ_CANCELED;
122 wake_up_interruptible(&hdev->req_wait_q);
123 }
124}
125
126/* Execute request and wait for completion. */
8e87d142 127static int __hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 128 unsigned long opt, __u32 timeout)
1da177e4
LT		 129{
130 DECLARE_WAITQUEUE(wait, current);
131 int err = 0;
132
133 BT_DBG("%s start", hdev->name);
134
135 hdev->req_status = HCI_REQ_PEND;
136
137 add_wait_queue(&hdev->req_wait_q, &wait);
138 set_current_state(TASK_INTERRUPTIBLE);
139
140 req(hdev, opt);
141 schedule_timeout(timeout);
142
143 remove_wait_queue(&hdev->req_wait_q, &wait);
144
145 if (signal_pending(current))
146 return -EINTR;
147
148 switch (hdev->req_status) {
149 case HCI_REQ_DONE:
e175072f 150 err = -bt_to_errno(hdev->req_result);
1da177e4
LT		 151 break;
152
153 case HCI_REQ_CANCELED:
154 err = -hdev->req_result;
155 break;
156
157 default:
158 err = -ETIMEDOUT;
159 break;
3ff50b79 160 }
1da177e4 161
a5040efa 162 hdev->req_status = hdev->req_result = 0;
1da177e4
LT		 163
164 BT_DBG("%s end: err %d", hdev->name, err);
165
166 return err;
167}
168
169static inline int hci_request(struct hci_dev *hdev, void (*req)(struct hci_dev *hdev, unsigned long opt),
01df8c31 170 unsigned long opt, __u32 timeout)
1da177e4
LT		 171{
172 int ret;
173
7c6a329e
MH		 174 if (!test_bit(HCI_UP, &hdev->flags))
175 return -ENETDOWN;
176
1da177e4
LT		 177 /* Serialize all requests */
178 hci_req_lock(hdev);
179 ret = __hci_request(hdev, req, opt, timeout);
180 hci_req_unlock(hdev);
181
182 return ret;
183}
184
185static void hci_reset_req(struct hci_dev *hdev, unsigned long opt)
186{
187 BT_DBG("%s %ld", hdev->name, opt);
188
189 /* Reset device */
f630cf0d 190 set_bit(HCI_RESET, &hdev->flags);
a9de9248 191 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
1da177e4
LT		 192}
193
e61ef499 194static void bredr_init(struct hci_dev *hdev)
1da177e4 195{
b0916ea0 196 struct hci_cp_delete_stored_link_key cp;
1ebb9252 197 __le16 param;
89f2783d 198 __u8 flt_type;
1da177e4 199
2455a3ea
AE		 200 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_PACKET_BASED;
201
1da177e4
LT		 202 /* Mandatory initialization */
203
204 /* Reset */
f630cf0d 205 if (!test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
e61ef499
AE		 206 set_bit(HCI_RESET, &hdev->flags);
207 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
f630cf0d 208 }
1da177e4
LT		 209
210 /* Read Local Supported Features */
a9de9248 211 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_FEATURES, 0, NULL);
1da177e4 212
1143e5a6 213 /* Read Local Version */
a9de9248 214 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
1143e5a6 215
1da177e4 216 /* Read Buffer Size (ACL mtu, max pkt, etc.) */
a9de9248 217 hci_send_cmd(hdev, HCI_OP_READ_BUFFER_SIZE, 0, NULL);
1da177e4 218
1da177e4 219 /* Read BD Address */
a9de9248
MH		 220 hci_send_cmd(hdev, HCI_OP_READ_BD_ADDR, 0, NULL);
221
222 /* Read Class of Device */
223 hci_send_cmd(hdev, HCI_OP_READ_CLASS_OF_DEV, 0, NULL);
224
225 /* Read Local Name */
226 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_NAME, 0, NULL);
1da177e4
LT		 227
228 /* Read Voice Setting */
a9de9248 229 hci_send_cmd(hdev, HCI_OP_READ_VOICE_SETTING, 0, NULL);
1da177e4
LT		 230
231 /* Optional initialization */
232
233 /* Clear Event Filters */
89f2783d 234 flt_type = HCI_FLT_CLEAR_ALL;
a9de9248 235 hci_send_cmd(hdev, HCI_OP_SET_EVENT_FLT, 1, &flt_type);
1da177e4 236
1da177e4 237 /* Connection accept timeout ~20 secs */
aca3192c 238 param = cpu_to_le16(0x7d00);
a9de9248 239 hci_send_cmd(hdev, HCI_OP_WRITE_CA_TIMEOUT, 2, &param);
b0916ea0
JH		 240
241 bacpy(&cp.bdaddr, BDADDR_ANY);
242 cp.delete_all = 1;
243 hci_send_cmd(hdev, HCI_OP_DELETE_STORED_LINK_KEY, sizeof(cp), &cp);
1da177e4
LT		 244}
245
e61ef499
AE		 246static void amp_init(struct hci_dev *hdev)
247{
2455a3ea
AE		 248 hdev->flow_ctl_mode = HCI_FLOW_CTL_MODE_BLOCK_BASED;
249
e61ef499
AE		 250 /* Reset */
251 hci_send_cmd(hdev, HCI_OP_RESET, 0, NULL);
252
253 /* Read Local Version */
254 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_VERSION, 0, NULL);
6bcbc489
AE		 255
256 /* Read Local AMP Info */
257 hci_send_cmd(hdev, HCI_OP_READ_LOCAL_AMP_INFO, 0, NULL);
e61ef499
AE		 258}
259
260static void hci_init_req(struct hci_dev *hdev, unsigned long opt)
261{
262 struct sk_buff *skb;
263
264 BT_DBG("%s %ld", hdev->name, opt);
265
266 /* Driver initialization */
267
268 /* Special commands */
269 while ((skb = skb_dequeue(&hdev->driver_init))) {
270 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
271 skb->dev = (void *) hdev;
272
273 skb_queue_tail(&hdev->cmd_q, skb);
274 queue_work(hdev->workqueue, &hdev->cmd_work);
275 }
276 skb_queue_purge(&hdev->driver_init);
277
278 switch (hdev->dev_type) {
279 case HCI_BREDR:
280 bredr_init(hdev);
281 break;
282
283 case HCI_AMP:
284 amp_init(hdev);
285 break;
286
287 default:
288 BT_ERR("Unknown device type %d", hdev->dev_type);
289 break;
290 }
291
292}
293
6ed58ec5
VT		 294static void hci_le_init_req(struct hci_dev *hdev, unsigned long opt)
295{
296 BT_DBG("%s", hdev->name);
297
298 /* Read LE buffer size */
299 hci_send_cmd(hdev, HCI_OP_LE_READ_BUFFER_SIZE, 0, NULL);
300}
301
1da177e4
LT		 302static void hci_scan_req(struct hci_dev *hdev, unsigned long opt)
303{
304 __u8 scan = opt;
305
306 BT_DBG("%s %x", hdev->name, scan);
307
308 /* Inquiry and Page scans */
a9de9248 309 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, 1, &scan);
1da177e4
LT		 310}
311
312static void hci_auth_req(struct hci_dev *hdev, unsigned long opt)
313{
314 __u8 auth = opt;
315
316 BT_DBG("%s %x", hdev->name, auth);
317
318 /* Authentication */
a9de9248 319 hci_send_cmd(hdev, HCI_OP_WRITE_AUTH_ENABLE, 1, &auth);
1da177e4
LT		 320}
321
322static void hci_encrypt_req(struct hci_dev *hdev, unsigned long opt)
323{
324 __u8 encrypt = opt;
325
326 BT_DBG("%s %x", hdev->name, encrypt);
327
e4e8e37c 328 /* Encryption */
a9de9248 329 hci_send_cmd(hdev, HCI_OP_WRITE_ENCRYPT_MODE, 1, &encrypt);
1da177e4
LT		 330}
331
e4e8e37c
MH		 332static void hci_linkpol_req(struct hci_dev *hdev, unsigned long opt)
333{
334 __le16 policy = cpu_to_le16(opt);
335
a418b893 336 BT_DBG("%s %x", hdev->name, policy);
e4e8e37c
MH		 337
338 /* Default link policy */
339 hci_send_cmd(hdev, HCI_OP_WRITE_DEF_LINK_POLICY, 2, &policy);
340}
341
8e87d142 342/* Get HCI device by index.
1da177e4
LT		 343 * Device is held on return. */
344struct hci_dev *hci_dev_get(int index)
345{
8035ded4 346 struct hci_dev *hdev = NULL, *d;
1da177e4
LT		 347
348 BT_DBG("%d", index);
349
350 if (index < 0)
351 return NULL;
352
353 read_lock(&hci_dev_list_lock);
8035ded4 354 list_for_each_entry(d, &hci_dev_list, list) {
1da177e4
LT		 355 if (d->id == index) {
356 hdev = hci_dev_hold(d);
357 break;
358 }
359 }
360 read_unlock(&hci_dev_list_lock);
361 return hdev;
362}
1da177e4
LT		 363
364/* ---- Inquiry support ---- */
ff9ef578 365
30dc78e1
JH		 366bool hci_discovery_active(struct hci_dev *hdev)
367{
368 struct discovery_state *discov = &hdev->discovery;
369
6fbe195d 370 switch (discov->state) {
343f935b 371 case DISCOVERY_FINDING:
6fbe195d 372 case DISCOVERY_RESOLVING:
30dc78e1
JH		 373 return true;
374
6fbe195d
AG		 375 default:
376 return false;
377 }
30dc78e1
JH		 378}
379
ff9ef578
JH		 380void hci_discovery_set_state(struct hci_dev *hdev, int state)
381{
382 BT_DBG("%s state %u -> %u", hdev->name, hdev->discovery.state, state);
383
384 if (hdev->discovery.state == state)
385 return;
386
387 switch (state) {
388 case DISCOVERY_STOPPED:
7b99b659
AG		 389 if (hdev->discovery.state != DISCOVERY_STARTING)
390 mgmt_discovering(hdev, 0);
ff9ef578
JH		 391 break;
392 case DISCOVERY_STARTING:
393 break;
343f935b 394 case DISCOVERY_FINDING:
ff9ef578
JH		 395 mgmt_discovering(hdev, 1);
396 break;
30dc78e1
JH		 397 case DISCOVERY_RESOLVING:
398 break;
ff9ef578
JH		 399 case DISCOVERY_STOPPING:
400 break;
401 }
402
403 hdev->discovery.state = state;
404}
405
1da177e4
LT		 406static void inquiry_cache_flush(struct hci_dev *hdev)
407{
30883512 408 struct discovery_state *cache = &hdev->discovery;
b57c1a56 409 struct inquiry_entry *p, *n;
1da177e4 410
561aafbc
JH		 411 list_for_each_entry_safe(p, n, &cache->all, all) {
412 list_del(&p->all);
b57c1a56 413 kfree(p);
1da177e4 414 }
561aafbc
JH		 415
416 INIT_LIST_HEAD(&cache->unknown);
417 INIT_LIST_HEAD(&cache->resolve);
1da177e4
LT		 418}
419
420struct inquiry_entry *hci_inquiry_cache_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
421{
30883512 422 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 423 struct inquiry_entry *e;
424
425 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
426
561aafbc
JH		 427 list_for_each_entry(e, &cache->all, all) {
428 if (!bacmp(&e->data.bdaddr, bdaddr))
429 return e;
430 }
431
432 return NULL;
433}
434
435struct inquiry_entry *hci_inquiry_cache_lookup_unknown(struct hci_dev *hdev,
04124681 436 bdaddr_t *bdaddr)
561aafbc 437{
30883512 438 struct discovery_state *cache = &hdev->discovery;
561aafbc
JH		 439 struct inquiry_entry *e;
440
441 BT_DBG("cache %p, %s", cache, batostr(bdaddr));
442
443 list_for_each_entry(e, &cache->unknown, list) {
1da177e4 444 if (!bacmp(&e->data.bdaddr, bdaddr))
b57c1a56
JH		 445 return e;
446 }
447
448 return NULL;
1da177e4
LT		 449}
450
30dc78e1 451struct inquiry_entry *hci_inquiry_cache_lookup_resolve(struct hci_dev *hdev,
04124681
GP		 452 bdaddr_t *bdaddr,
453 int state)
30dc78e1
JH		 454{
455 struct discovery_state *cache = &hdev->discovery;
456 struct inquiry_entry *e;
457
458 BT_DBG("cache %p bdaddr %s state %d", cache, batostr(bdaddr), state);
459
460 list_for_each_entry(e, &cache->resolve, list) {
461 if (!bacmp(bdaddr, BDADDR_ANY) && e->name_state == state)
462 return e;
463 if (!bacmp(&e->data.bdaddr, bdaddr))
464 return e;
465 }
466
467 return NULL;
468}
469
a3d4e20a 470void hci_inquiry_cache_update_resolve(struct hci_dev *hdev,
04124681 471 struct inquiry_entry *ie)
a3d4e20a
JH		 472{
473 struct discovery_state *cache = &hdev->discovery;
474 struct list_head *pos = &cache->resolve;
475 struct inquiry_entry *p;
476
477 list_del(&ie->list);
478
479 list_for_each_entry(p, &cache->resolve, list) {
480 if (p->name_state != NAME_PENDING &&
481 abs(p->data.rssi) >= abs(ie->data.rssi))
482 break;
483 pos = &p->list;
484 }
485
486 list_add(&ie->list, pos);
487}
488
3175405b 489bool hci_inquiry_cache_update(struct hci_dev *hdev, struct inquiry_data *data,
04124681 490 bool name_known, bool *ssp)
1da177e4 491{
30883512 492 struct discovery_state *cache = &hdev->discovery;
70f23020 493 struct inquiry_entry *ie;
1da177e4
LT		 494
495 BT_DBG("cache %p, %s", cache, batostr(&data->bdaddr));
496
388fc8fa
JH		 497 if (ssp)
498 *ssp = data->ssp_mode;
499
70f23020 500 ie = hci_inquiry_cache_lookup(hdev, &data->bdaddr);
a3d4e20a 501 if (ie) {
388fc8fa
JH		 502 if (ie->data.ssp_mode && ssp)
503 *ssp = true;
504
a3d4e20a
JH		 505 if (ie->name_state == NAME_NEEDED &&
506 data->rssi != ie->data.rssi) {
507 ie->data.rssi = data->rssi;
508 hci_inquiry_cache_update_resolve(hdev, ie);
509 }
510
561aafbc 511 goto update;
a3d4e20a 512 }
561aafbc
JH		 513
514 /* Entry not in the cache. Add new one. */
515 ie = kzalloc(sizeof(struct inquiry_entry), GFP_ATOMIC);
516 if (!ie)
3175405b 517 return false;
561aafbc
JH		 518
519 list_add(&ie->all, &cache->all);
520
521 if (name_known) {
522 ie->name_state = NAME_KNOWN;
523 } else {
524 ie->name_state = NAME_NOT_KNOWN;
525 list_add(&ie->list, &cache->unknown);
526 }
70f23020 527
561aafbc
JH		 528update:
529 if (name_known && ie->name_state != NAME_KNOWN &&
530 ie->name_state != NAME_PENDING) {
531 ie->name_state = NAME_KNOWN;
532 list_del(&ie->list);
1da177e4
LT		 533 }
534
70f23020
AE		 535 memcpy(&ie->data, data, sizeof(*data));
536 ie->timestamp = jiffies;
1da177e4 537 cache->timestamp = jiffies;
3175405b
JH		 538
539 if (ie->name_state == NAME_NOT_KNOWN)
540 return false;
541
542 return true;
1da177e4
LT		 543}
544
545static int inquiry_cache_dump(struct hci_dev *hdev, int num, __u8 *buf)
546{
30883512 547 struct discovery_state *cache = &hdev->discovery;
1da177e4
LT		 548 struct inquiry_info *info = (struct inquiry_info *) buf;
549 struct inquiry_entry *e;
550 int copied = 0;
551
561aafbc 552 list_for_each_entry(e, &cache->all, all) {
1da177e4 553 struct inquiry_data *data = &e->data;
b57c1a56
JH		 554
555 if (copied >= num)
556 break;
557
1da177e4
LT		 558 bacpy(&info->bdaddr, &data->bdaddr);
559 info->pscan_rep_mode = data->pscan_rep_mode;
560 info->pscan_period_mode = data->pscan_period_mode;
561 info->pscan_mode = data->pscan_mode;
562 memcpy(info->dev_class, data->dev_class, 3);
563 info->clock_offset = data->clock_offset;
b57c1a56 564
1da177e4 565 info++;
b57c1a56 566 copied++;
1da177e4
LT		 567 }
568
569 BT_DBG("cache %p, copied %d", cache, copied);
570 return copied;
571}
572
573static void hci_inq_req(struct hci_dev *hdev, unsigned long opt)
574{
575 struct hci_inquiry_req *ir = (struct hci_inquiry_req *) opt;
576 struct hci_cp_inquiry cp;
577
578 BT_DBG("%s", hdev->name);
579
580 if (test_bit(HCI_INQUIRY, &hdev->flags))
581 return;
582
583 /* Start Inquiry */
584 memcpy(&cp.lap, &ir->lap, 3);
585 cp.length = ir->length;
586 cp.num_rsp = ir->num_rsp;
a9de9248 587 hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
1da177e4
LT		 588}
589
590int hci_inquiry(void __user *arg)
591{
592 __u8 __user *ptr = arg;
593 struct hci_inquiry_req ir;
594 struct hci_dev *hdev;
595 int err = 0, do_inquiry = 0, max_rsp;
596 long timeo;
597 __u8 *buf;
598
599 if (copy_from_user(&ir, ptr, sizeof(ir)))
600 return -EFAULT;
601
5a08ecce
AE		 602 hdev = hci_dev_get(ir.dev_id);
603 if (!hdev)
1da177e4
LT		 604 return -ENODEV;
605
09fd0de5 606 hci_dev_lock(hdev);
8e87d142 607 if (inquiry_cache_age(hdev) > INQUIRY_CACHE_AGE_MAX ||
70f23020
AE		 608 inquiry_cache_empty(hdev) ||
609 ir.flags & IREQ_CACHE_FLUSH) {
1da177e4
LT		 610 inquiry_cache_flush(hdev);
611 do_inquiry = 1;
612 }
09fd0de5 613 hci_dev_unlock(hdev);
1da177e4 614
04837f64 615 timeo = ir.length * msecs_to_jiffies(2000);
70f23020
AE		 616
617 if (do_inquiry) {
618 err = hci_request(hdev, hci_inq_req, (unsigned long)&ir, timeo);
619 if (err < 0)
620 goto done;
621 }
1da177e4
LT		 622
623 /* for unlimited number of responses we will use buffer with 255 entries */
624 max_rsp = (ir.num_rsp == 0) ? 255 : ir.num_rsp;
625
626 /* cache_dump can't sleep. Therefore we allocate temp buffer and then
627 * copy it to the user space.
628 */
01df8c31 629 buf = kmalloc(sizeof(struct inquiry_info) * max_rsp, GFP_KERNEL);
70f23020 630 if (!buf) {
1da177e4
LT		 631 err = -ENOMEM;
632 goto done;
633 }
634
09fd0de5 635 hci_dev_lock(hdev);
1da177e4 636 ir.num_rsp = inquiry_cache_dump(hdev, max_rsp, buf);
09fd0de5 637 hci_dev_unlock(hdev);
1da177e4
LT		 638
639 BT_DBG("num_rsp %d", ir.num_rsp);
640
641 if (!copy_to_user(ptr, &ir, sizeof(ir))) {
642 ptr += sizeof(ir);
643 if (copy_to_user(ptr, buf, sizeof(struct inquiry_info) *
644 ir.num_rsp))
645 err = -EFAULT;
8e87d142 646 } else
1da177e4
LT		 647 err = -EFAULT;
648
649 kfree(buf);
650
651done:
652 hci_dev_put(hdev);
653 return err;
654}
655
656/* ---- HCI ioctl helpers ---- */
657
658int hci_dev_open(__u16 dev)
659{
660 struct hci_dev *hdev;
661 int ret = 0;
662
5a08ecce
AE		 663 hdev = hci_dev_get(dev);
664 if (!hdev)
1da177e4
LT		 665 return -ENODEV;
666
667 BT_DBG("%s %p", hdev->name, hdev);
668
669 hci_req_lock(hdev);
670
94324962
JH		 671 if (test_bit(HCI_UNREGISTER, &hdev->dev_flags)) {
672 ret = -ENODEV;
673 goto done;
674 }
675
611b30f7
MH		 676 if (hdev->rfkill && rfkill_blocked(hdev->rfkill)) {
677 ret = -ERFKILL;
678 goto done;
679 }
680
1da177e4
LT		 681 if (test_bit(HCI_UP, &hdev->flags)) {
682 ret = -EALREADY;
683 goto done;
684 }
685
686 if (test_bit(HCI_QUIRK_RAW_DEVICE, &hdev->quirks))
687 set_bit(HCI_RAW, &hdev->flags);
688
07e3b94a
AE		 689 /* Treat all non BR/EDR controllers as raw devices if
690 enable_hs is not set */
691 if (hdev->dev_type != HCI_BREDR && !enable_hs)
943da25d
MH		 692 set_bit(HCI_RAW, &hdev->flags);
693
1da177e4
LT		 694 if (hdev->open(hdev)) {
695 ret = -EIO;
696 goto done;
697 }
698
699 if (!test_bit(HCI_RAW, &hdev->flags)) {
700 atomic_set(&hdev->cmd_cnt, 1);
701 set_bit(HCI_INIT, &hdev->flags);
a5040efa 702 hdev->init_last_cmd = 0;
1da177e4 703
04837f64
MH		 704 ret = __hci_request(hdev, hci_init_req, 0,
705 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4 706
eead27da 707 if (lmp_host_le_capable(hdev))
6ed58ec5
VT		 708 ret = __hci_request(hdev, hci_le_init_req, 0,
709 msecs_to_jiffies(HCI_INIT_TIMEOUT));
710
1da177e4
LT		 711 clear_bit(HCI_INIT, &hdev->flags);
712 }
713
714 if (!ret) {
715 hci_dev_hold(hdev);
716 set_bit(HCI_UP, &hdev->flags);
717 hci_notify(hdev, HCI_DEV_UP);
a8b2d5c2 718 if (!test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 719 hci_dev_lock(hdev);
744cf19e 720 mgmt_powered(hdev, 1);
09fd0de5 721 hci_dev_unlock(hdev);
56e5cb86 722 }
8e87d142 723 } else {
1da177e4 724 /* Init failed, cleanup */
3eff45ea 725 flush_work(&hdev->tx_work);
c347b765 726 flush_work(&hdev->cmd_work);
b78752cc 727 flush_work(&hdev->rx_work);
1da177e4
LT		 728
729 skb_queue_purge(&hdev->cmd_q);
730 skb_queue_purge(&hdev->rx_q);
731
732 if (hdev->flush)
733 hdev->flush(hdev);
734
735 if (hdev->sent_cmd) {
736 kfree_skb(hdev->sent_cmd);
737 hdev->sent_cmd = NULL;
738 }
739
740 hdev->close(hdev);
741 hdev->flags = 0;
742 }
743
744done:
745 hci_req_unlock(hdev);
746 hci_dev_put(hdev);
747 return ret;
748}
749
750static int hci_dev_do_close(struct hci_dev *hdev)
751{
752 BT_DBG("%s %p", hdev->name, hdev);
753
28b75a89
AG		 754 cancel_work_sync(&hdev->le_scan);
755
1da177e4
LT		 756 hci_req_cancel(hdev, ENODEV);
757 hci_req_lock(hdev);
758
759 if (!test_and_clear_bit(HCI_UP, &hdev->flags)) {
b79f44c1 760 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 761 hci_req_unlock(hdev);
762 return 0;
763 }
764
3eff45ea
GP		 765 /* Flush RX and TX works */
766 flush_work(&hdev->tx_work);
b78752cc 767 flush_work(&hdev->rx_work);
1da177e4 768
16ab91ab 769 if (hdev->discov_timeout > 0) {
e0f9309f 770 cancel_delayed_work(&hdev->discov_off);
16ab91ab 771 hdev->discov_timeout = 0;
5e5282bb 772 clear_bit(HCI_DISCOVERABLE, &hdev->dev_flags);
16ab91ab
JH		 773 }
774
a8b2d5c2 775 if (test_and_clear_bit(HCI_SERVICE_CACHE, &hdev->dev_flags))
7d78525d
JH		 776 cancel_delayed_work(&hdev->service_cache);
777
7ba8b4be
AG		 778 cancel_delayed_work_sync(&hdev->le_scan_disable);
779
09fd0de5 780 hci_dev_lock(hdev);
1da177e4
LT		 781 inquiry_cache_flush(hdev);
782 hci_conn_hash_flush(hdev);
09fd0de5 783 hci_dev_unlock(hdev);
1da177e4
LT		 784
785 hci_notify(hdev, HCI_DEV_DOWN);
786
787 if (hdev->flush)
788 hdev->flush(hdev);
789
790 /* Reset device */
791 skb_queue_purge(&hdev->cmd_q);
792 atomic_set(&hdev->cmd_cnt, 1);
8af59467
JH		 793 if (!test_bit(HCI_RAW, &hdev->flags) &&
794 test_bit(HCI_QUIRK_NO_RESET, &hdev->quirks)) {
1da177e4 795 set_bit(HCI_INIT, &hdev->flags);
04837f64 796 __hci_request(hdev, hci_reset_req, 0,
cad44c2b 797 msecs_to_jiffies(250));
1da177e4
LT		 798 clear_bit(HCI_INIT, &hdev->flags);
799 }
800
c347b765
GP		 801 /* flush cmd work */
802 flush_work(&hdev->cmd_work);
1da177e4
LT		 803
804 /* Drop queues */
805 skb_queue_purge(&hdev->rx_q);
806 skb_queue_purge(&hdev->cmd_q);
807 skb_queue_purge(&hdev->raw_q);
808
809 /* Drop last sent command */
810 if (hdev->sent_cmd) {
b79f44c1 811 del_timer_sync(&hdev->cmd_timer);
1da177e4
LT		 812 kfree_skb(hdev->sent_cmd);
813 hdev->sent_cmd = NULL;
814 }
815
816 /* After this point our queues are empty
817 * and no tasks are scheduled. */
818 hdev->close(hdev);
819
8ee56540
MH		 820 if (!test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags)) {
821 hci_dev_lock(hdev);
822 mgmt_powered(hdev, 0);
823 hci_dev_unlock(hdev);
824 }
5add6af8 825
1da177e4
LT		 826 /* Clear flags */
827 hdev->flags = 0;
828
e59fda8d 829 memset(hdev->eir, 0, sizeof(hdev->eir));
09b3c3fb 830 memset(hdev->dev_class, 0, sizeof(hdev->dev_class));
e59fda8d 831
1da177e4
LT		 832 hci_req_unlock(hdev);
833
834 hci_dev_put(hdev);
835 return 0;
836}
837
838int hci_dev_close(__u16 dev)
839{
840 struct hci_dev *hdev;
841 int err;
842
70f23020
AE		 843 hdev = hci_dev_get(dev);
844 if (!hdev)
1da177e4 845 return -ENODEV;
8ee56540
MH		 846
847 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
848 cancel_delayed_work(&hdev->power_off);
849
1da177e4 850 err = hci_dev_do_close(hdev);
8ee56540 851
1da177e4
LT		 852 hci_dev_put(hdev);
853 return err;
854}
855
856int hci_dev_reset(__u16 dev)
857{
858 struct hci_dev *hdev;
859 int ret = 0;
860
70f23020
AE		 861 hdev = hci_dev_get(dev);
862 if (!hdev)
1da177e4
LT		 863 return -ENODEV;
864
865 hci_req_lock(hdev);
1da177e4
LT		 866
867 if (!test_bit(HCI_UP, &hdev->flags))
868 goto done;
869
870 /* Drop queues */
871 skb_queue_purge(&hdev->rx_q);
872 skb_queue_purge(&hdev->cmd_q);
873
09fd0de5 874 hci_dev_lock(hdev);
1da177e4
LT		 875 inquiry_cache_flush(hdev);
876 hci_conn_hash_flush(hdev);
09fd0de5 877 hci_dev_unlock(hdev);
1da177e4
LT		 878
879 if (hdev->flush)
880 hdev->flush(hdev);
881
8e87d142 882 atomic_set(&hdev->cmd_cnt, 1);
6ed58ec5 883 hdev->acl_cnt = 0; hdev->sco_cnt = 0; hdev->le_cnt = 0;
1da177e4
LT		 884
885 if (!test_bit(HCI_RAW, &hdev->flags))
04837f64
MH		 886 ret = __hci_request(hdev, hci_reset_req, 0,
887 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 888
889done:
1da177e4
LT		 890 hci_req_unlock(hdev);
891 hci_dev_put(hdev);
892 return ret;
893}
894
895int hci_dev_reset_stat(__u16 dev)
896{
897 struct hci_dev *hdev;
898 int ret = 0;
899
70f23020
AE		 900 hdev = hci_dev_get(dev);
901 if (!hdev)
1da177e4
LT		 902 return -ENODEV;
903
904 memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
905
906 hci_dev_put(hdev);
907
908 return ret;
909}
910
911int hci_dev_cmd(unsigned int cmd, void __user *arg)
912{
913 struct hci_dev *hdev;
914 struct hci_dev_req dr;
915 int err = 0;
916
917 if (copy_from_user(&dr, arg, sizeof(dr)))
918 return -EFAULT;
919
70f23020
AE		 920 hdev = hci_dev_get(dr.dev_id);
921 if (!hdev)
1da177e4
LT		 922 return -ENODEV;
923
924 switch (cmd) {
925 case HCISETAUTH:
04837f64
MH		 926 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
927 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 928 break;
929
930 case HCISETENCRYPT:
931 if (!lmp_encrypt_capable(hdev)) {
932 err = -EOPNOTSUPP;
933 break;
934 }
935
936 if (!test_bit(HCI_AUTH, &hdev->flags)) {
937 /* Auth must be enabled first */
04837f64
MH		 938 err = hci_request(hdev, hci_auth_req, dr.dev_opt,
939 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 940 if (err)
941 break;
942 }
943
04837f64
MH		 944 err = hci_request(hdev, hci_encrypt_req, dr.dev_opt,
945 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 946 break;
947
948 case HCISETSCAN:
04837f64
MH		 949 err = hci_request(hdev, hci_scan_req, dr.dev_opt,
950 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 951 break;
952
1da177e4 953 case HCISETLINKPOL:
e4e8e37c
MH		 954 err = hci_request(hdev, hci_linkpol_req, dr.dev_opt,
955 msecs_to_jiffies(HCI_INIT_TIMEOUT));
1da177e4
LT		 956 break;
957
958 case HCISETLINKMODE:
e4e8e37c
MH		 959 hdev->link_mode = ((__u16) dr.dev_opt) &
960 (HCI_LM_MASTER | HCI_LM_ACCEPT);
961 break;
962
963 case HCISETPTYPE:
964 hdev->pkt_type = (__u16) dr.dev_opt;
1da177e4
LT		 965 break;
966
967 case HCISETACLMTU:
e4e8e37c
MH		 968 hdev->acl_mtu = *((__u16 *) &dr.dev_opt + 1);
969 hdev->acl_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 970 break;
971
972 case HCISETSCOMTU:
e4e8e37c
MH		 973 hdev->sco_mtu = *((__u16 *) &dr.dev_opt + 1);
974 hdev->sco_pkts = *((__u16 *) &dr.dev_opt + 0);
1da177e4
LT		 975 break;
976
977 default:
978 err = -EINVAL;
979 break;
980 }
e4e8e37c 981
1da177e4
LT		 982 hci_dev_put(hdev);
983 return err;
984}
985
986int hci_get_dev_list(void __user *arg)
987{
8035ded4 988 struct hci_dev *hdev;
1da177e4
LT		 989 struct hci_dev_list_req *dl;
990 struct hci_dev_req *dr;
1da177e4
LT		 991 int n = 0, size, err;
992 __u16 dev_num;
993
994 if (get_user(dev_num, (__u16 __user *) arg))
995 return -EFAULT;
996
997 if (!dev_num || dev_num > (PAGE_SIZE * 2) / sizeof(*dr))
998 return -EINVAL;
999
1000 size = sizeof(*dl) + dev_num * sizeof(*dr);
1001
70f23020
AE		 1002 dl = kzalloc(size, GFP_KERNEL);
1003 if (!dl)
1da177e4
LT		 1004 return -ENOMEM;
1005
1006 dr = dl->dev_req;
1007
f20d09d5 1008 read_lock(&hci_dev_list_lock);
8035ded4 1009 list_for_each_entry(hdev, &hci_dev_list, list) {
a8b2d5c2 1010 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
e0f9309f 1011 cancel_delayed_work(&hdev->power_off);
c542a06c 1012
a8b2d5c2
JH		 1013 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1014 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1015
1da177e4
LT		 1016 (dr + n)->dev_id = hdev->id;
1017 (dr + n)->dev_opt = hdev->flags;
c542a06c 1018
1da177e4
LT		 1019 if (++n >= dev_num)
1020 break;
1021 }
f20d09d5 1022 read_unlock(&hci_dev_list_lock);
1da177e4
LT		 1023
1024 dl->dev_num = n;
1025 size = sizeof(*dl) + n * sizeof(*dr);
1026
1027 err = copy_to_user(arg, dl, size);
1028 kfree(dl);
1029
1030 return err ? -EFAULT : 0;
1031}
1032
1033int hci_get_dev_info(void __user *arg)
1034{
1035 struct hci_dev *hdev;
1036 struct hci_dev_info di;
1037 int err = 0;
1038
1039 if (copy_from_user(&di, arg, sizeof(di)))
1040 return -EFAULT;
1041
70f23020
AE		 1042 hdev = hci_dev_get(di.dev_id);
1043 if (!hdev)
1da177e4
LT		 1044 return -ENODEV;
1045
a8b2d5c2 1046 if (test_and_clear_bit(HCI_AUTO_OFF, &hdev->dev_flags))
3243553f 1047 cancel_delayed_work_sync(&hdev->power_off);
ab81cbf9 1048
a8b2d5c2
JH		 1049 if (!test_bit(HCI_MGMT, &hdev->dev_flags))
1050 set_bit(HCI_PAIRABLE, &hdev->dev_flags);
c542a06c 1051
1da177e4
LT		 1052 strcpy(di.name, hdev->name);
1053 di.bdaddr = hdev->bdaddr;
943da25d 1054 di.type = (hdev->bus & 0x0f) | (hdev->dev_type << 4);
1da177e4
LT		 1055 di.flags = hdev->flags;
1056 di.pkt_type = hdev->pkt_type;
1057 di.acl_mtu = hdev->acl_mtu;
1058 di.acl_pkts = hdev->acl_pkts;
1059 di.sco_mtu = hdev->sco_mtu;
1060 di.sco_pkts = hdev->sco_pkts;
1061 di.link_policy = hdev->link_policy;
1062 di.link_mode = hdev->link_mode;
1063
1064 memcpy(&di.stat, &hdev->stat, sizeof(di.stat));
1065 memcpy(&di.features, &hdev->features, sizeof(di.features));
1066
1067 if (copy_to_user(arg, &di, sizeof(di)))
1068 err = -EFAULT;
1069
1070 hci_dev_put(hdev);
1071
1072 return err;
1073}
1074
1075/* ---- Interface to HCI drivers ---- */
1076
611b30f7
MH		 1077static int hci_rfkill_set_block(void *data, bool blocked)
1078{
1079 struct hci_dev *hdev = data;
1080
1081 BT_DBG("%p name %s blocked %d", hdev, hdev->name, blocked);
1082
1083 if (!blocked)
1084 return 0;
1085
1086 hci_dev_do_close(hdev);
1087
1088 return 0;
1089}
1090
1091static const struct rfkill_ops hci_rfkill_ops = {
1092 .set_block = hci_rfkill_set_block,
1093};
1094
ab81cbf9
JH		 1095static void hci_power_on(struct work_struct *work)
1096{
1097 struct hci_dev *hdev = container_of(work, struct hci_dev, power_on);
1098
1099 BT_DBG("%s", hdev->name);
1100
1101 if (hci_dev_open(hdev->id) < 0)
1102 return;
1103
a8b2d5c2 1104 if (test_bit(HCI_AUTO_OFF, &hdev->dev_flags))
80b7ab33 1105 schedule_delayed_work(&hdev->power_off,
3243553f 1106 msecs_to_jiffies(AUTO_OFF_TIMEOUT));
ab81cbf9 1107
a8b2d5c2 1108 if (test_and_clear_bit(HCI_SETUP, &hdev->dev_flags))
744cf19e 1109 mgmt_index_added(hdev);
ab81cbf9
JH		 1110}
1111
1112static void hci_power_off(struct work_struct *work)
1113{
3243553f
JH		 1114 struct hci_dev *hdev = container_of(work, struct hci_dev,
1115 power_off.work);
ab81cbf9
JH		 1116
1117 BT_DBG("%s", hdev->name);
1118
8ee56540 1119 hci_dev_do_close(hdev);
ab81cbf9
JH		 1120}
1121
16ab91ab
JH		 1122static void hci_discov_off(struct work_struct *work)
1123{
1124 struct hci_dev *hdev;
1125 u8 scan = SCAN_PAGE;
1126
1127 hdev = container_of(work, struct hci_dev, discov_off.work);
1128
1129 BT_DBG("%s", hdev->name);
1130
09fd0de5 1131 hci_dev_lock(hdev);
16ab91ab
JH		 1132
1133 hci_send_cmd(hdev, HCI_OP_WRITE_SCAN_ENABLE, sizeof(scan), &scan);
1134
1135 hdev->discov_timeout = 0;
1136
09fd0de5 1137 hci_dev_unlock(hdev);
16ab91ab
JH		 1138}
1139
2aeb9a1a
JH		 1140int hci_uuids_clear(struct hci_dev *hdev)
1141{
1142 struct list_head *p, *n;
1143
1144 list_for_each_safe(p, n, &hdev->uuids) {
1145 struct bt_uuid *uuid;
1146
1147 uuid = list_entry(p, struct bt_uuid, list);
1148
1149 list_del(p);
1150 kfree(uuid);
1151 }
1152
1153 return 0;
1154}
1155
55ed8ca1
JH		 1156int hci_link_keys_clear(struct hci_dev *hdev)
1157{
1158 struct list_head *p, *n;
1159
1160 list_for_each_safe(p, n, &hdev->link_keys) {
1161 struct link_key *key;
1162
1163 key = list_entry(p, struct link_key, list);
1164
1165 list_del(p);
1166 kfree(key);
1167 }
1168
1169 return 0;
1170}
1171
b899efaf
VCG		 1172int hci_smp_ltks_clear(struct hci_dev *hdev)
1173{
1174 struct smp_ltk *k, *tmp;
1175
1176 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1177 list_del(&k->list);
1178 kfree(k);
1179 }
1180
1181 return 0;
1182}
1183
55ed8ca1
JH		 1184struct link_key *hci_find_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1185{
8035ded4 1186 struct link_key *k;
55ed8ca1 1187
8035ded4 1188 list_for_each_entry(k, &hdev->link_keys, list)
55ed8ca1
JH		 1189 if (bacmp(bdaddr, &k->bdaddr) == 0)
1190 return k;
55ed8ca1
JH		 1191
1192 return NULL;
1193}
1194
745c0ce3 1195static bool hci_persistent_key(struct hci_dev *hdev, struct hci_conn *conn,
d25e28ab
JH		 1196 u8 key_type, u8 old_key_type)
1197{
1198 /* Legacy key */
1199 if (key_type < 0x03)
745c0ce3 1200 return true;
d25e28ab
JH		 1201
1202 /* Debug keys are insecure so don't store them persistently */
1203 if (key_type == HCI_LK_DEBUG_COMBINATION)
745c0ce3 1204 return false;
d25e28ab
JH		 1205
1206 /* Changed combination key and there's no previous one */
1207 if (key_type == HCI_LK_CHANGED_COMBINATION && old_key_type == 0xff)
745c0ce3 1208 return false;
d25e28ab
JH		 1209
1210 /* Security mode 3 case */
1211 if (!conn)
745c0ce3 1212 return true;
d25e28ab
JH		 1213
1214 /* Neither local nor remote side had no-bonding as requirement */
1215 if (conn->auth_type > 0x01 && conn->remote_auth > 0x01)
745c0ce3 1216 return true;
d25e28ab
JH		 1217
1218 /* Local side had dedicated bonding as requirement */
1219 if (conn->auth_type == 0x02 || conn->auth_type == 0x03)
745c0ce3 1220 return true;
d25e28ab
JH		 1221
1222 /* Remote side had dedicated bonding as requirement */
1223 if (conn->remote_auth == 0x02 || conn->remote_auth == 0x03)
745c0ce3 1224 return true;
d25e28ab
JH		 1225
1226 /* If none of the above criteria match, then don't store the key
1227 * persistently */
745c0ce3 1228 return false;
d25e28ab
JH		 1229}
1230
c9839a11 1231struct smp_ltk *hci_find_ltk(struct hci_dev *hdev, __le16 ediv, u8 rand[8])
75d262c2 1232{
c9839a11 1233 struct smp_ltk *k;
75d262c2 1234
c9839a11
VCG		 1235 list_for_each_entry(k, &hdev->long_term_keys, list) {
1236 if (k->ediv != ediv ||
1237 memcmp(rand, k->rand, sizeof(k->rand)))
75d262c2
VCG		 1238 continue;
1239
c9839a11 1240 return k;
75d262c2
VCG		 1241 }
1242
1243 return NULL;
1244}
1245EXPORT_SYMBOL(hci_find_ltk);
1246
c9839a11 1247struct smp_ltk *hci_find_ltk_by_addr(struct hci_dev *hdev, bdaddr_t *bdaddr,
04124681 1248 u8 addr_type)
75d262c2 1249{
c9839a11 1250 struct smp_ltk *k;
75d262c2 1251
c9839a11
VCG		 1252 list_for_each_entry(k, &hdev->long_term_keys, list)
1253 if (addr_type == k->bdaddr_type &&
1254 bacmp(bdaddr, &k->bdaddr) == 0)
75d262c2
VCG		 1255 return k;
1256
1257 return NULL;
1258}
c9839a11 1259EXPORT_SYMBOL(hci_find_ltk_by_addr);
75d262c2 1260
d25e28ab 1261int hci_add_link_key(struct hci_dev *hdev, struct hci_conn *conn, int new_key,
04124681 1262 bdaddr_t *bdaddr, u8 *val, u8 type, u8 pin_len)
55ed8ca1
JH		 1263{
1264 struct link_key *key, *old_key;
745c0ce3
VA		 1265 u8 old_key_type;
1266 bool persistent;
55ed8ca1
JH		 1267
1268 old_key = hci_find_link_key(hdev, bdaddr);
1269 if (old_key) {
1270 old_key_type = old_key->type;
1271 key = old_key;
1272 } else {
12adcf3a 1273 old_key_type = conn ? conn->key_type : 0xff;
55ed8ca1
JH		 1274 key = kzalloc(sizeof(*key), GFP_ATOMIC);
1275 if (!key)
1276 return -ENOMEM;
1277 list_add(&key->list, &hdev->link_keys);
1278 }
1279
1280 BT_DBG("%s key for %s type %u", hdev->name, batostr(bdaddr), type);
1281
d25e28ab
JH		 1282 /* Some buggy controller combinations generate a changed
1283 * combination key for legacy pairing even when there's no
1284 * previous key */
1285 if (type == HCI_LK_CHANGED_COMBINATION &&
1286 (!conn || conn->remote_auth == 0xff) &&
655fe6ec 1287 old_key_type == 0xff) {
d25e28ab 1288 type = HCI_LK_COMBINATION;
655fe6ec
JH		 1289 if (conn)
1290 conn->key_type = type;
1291 }
d25e28ab 1292
55ed8ca1
JH		 1293 bacpy(&key->bdaddr, bdaddr);
1294 memcpy(key->val, val, 16);
55ed8ca1
JH		 1295 key->pin_len = pin_len;
1296
b6020ba0 1297 if (type == HCI_LK_CHANGED_COMBINATION)
55ed8ca1 1298 key->type = old_key_type;
4748fed2
JH		 1299 else
1300 key->type = type;
1301
4df378a1
JH		 1302 if (!new_key)
1303 return 0;
1304
1305 persistent = hci_persistent_key(hdev, conn, type, old_key_type);
1306
744cf19e 1307 mgmt_new_link_key(hdev, key, persistent);
4df378a1 1308
6ec5bcad
VA		 1309 if (conn)
1310 conn->flush_key = !persistent;
55ed8ca1
JH		 1311
1312 return 0;
1313}
1314
c9839a11 1315int hci_add_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type, u8 type,
9a006657 1316 int new_key, u8 authenticated, u8 tk[16], u8 enc_size, __le16
04124681 1317 ediv, u8 rand[8])
75d262c2 1318{
c9839a11 1319 struct smp_ltk *key, *old_key;
75d262c2 1320
c9839a11
VCG		 1321 if (!(type & HCI_SMP_STK) && !(type & HCI_SMP_LTK))
1322 return 0;
75d262c2 1323
c9839a11
VCG		 1324 old_key = hci_find_ltk_by_addr(hdev, bdaddr, addr_type);
1325 if (old_key)
75d262c2 1326 key = old_key;
c9839a11
VCG		 1327 else {
1328 key = kzalloc(sizeof(*key), GFP_ATOMIC);
75d262c2
VCG		 1329 if (!key)
1330 return -ENOMEM;
c9839a11 1331 list_add(&key->list, &hdev->long_term_keys);
75d262c2
VCG		 1332 }
1333
75d262c2 1334 bacpy(&key->bdaddr, bdaddr);
c9839a11
VCG		 1335 key->bdaddr_type = addr_type;
1336 memcpy(key->val, tk, sizeof(key->val));
1337 key->authenticated = authenticated;
1338 key->ediv = ediv;
1339 key->enc_size = enc_size;
1340 key->type = type;
1341 memcpy(key->rand, rand, sizeof(key->rand));
75d262c2 1342
c9839a11
VCG		 1343 if (!new_key)
1344 return 0;
75d262c2 1345
261cc5aa
VCG		 1346 if (type & HCI_SMP_LTK)
1347 mgmt_new_ltk(hdev, key, 1);
1348
75d262c2
VCG		 1349 return 0;
1350}
1351
55ed8ca1
JH		 1352int hci_remove_link_key(struct hci_dev *hdev, bdaddr_t *bdaddr)
1353{
1354 struct link_key *key;
1355
1356 key = hci_find_link_key(hdev, bdaddr);
1357 if (!key)
1358 return -ENOENT;
1359
1360 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1361
1362 list_del(&key->list);
1363 kfree(key);
1364
1365 return 0;
1366}
1367
b899efaf
VCG		 1368int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr)
1369{
1370 struct smp_ltk *k, *tmp;
1371
1372 list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) {
1373 if (bacmp(bdaddr, &k->bdaddr))
1374 continue;
1375
1376 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1377
1378 list_del(&k->list);
1379 kfree(k);
1380 }
1381
1382 return 0;
1383}
1384
6bd32326
VT		 1385/* HCI command timer function */
1386static void hci_cmd_timer(unsigned long arg)
1387{
1388 struct hci_dev *hdev = (void *) arg;
1389
1390 BT_ERR("%s command tx timeout", hdev->name);
1391 atomic_set(&hdev->cmd_cnt, 1);
c347b765 1392 queue_work(hdev->workqueue, &hdev->cmd_work);
6bd32326
VT		 1393}
1394
2763eda6 1395struct oob_data *hci_find_remote_oob_data(struct hci_dev *hdev,
04124681 1396 bdaddr_t *bdaddr)
2763eda6
SJ		 1397{
1398 struct oob_data *data;
1399
1400 list_for_each_entry(data, &hdev->remote_oob_data, list)
1401 if (bacmp(bdaddr, &data->bdaddr) == 0)
1402 return data;
1403
1404 return NULL;
1405}
1406
1407int hci_remove_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr)
1408{
1409 struct oob_data *data;
1410
1411 data = hci_find_remote_oob_data(hdev, bdaddr);
1412 if (!data)
1413 return -ENOENT;
1414
1415 BT_DBG("%s removing %s", hdev->name, batostr(bdaddr));
1416
1417 list_del(&data->list);
1418 kfree(data);
1419
1420 return 0;
1421}
1422
1423int hci_remote_oob_data_clear(struct hci_dev *hdev)
1424{
1425 struct oob_data *data, *n;
1426
1427 list_for_each_entry_safe(data, n, &hdev->remote_oob_data, list) {
1428 list_del(&data->list);
1429 kfree(data);
1430 }
1431
1432 return 0;
1433}
1434
1435int hci_add_remote_oob_data(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 *hash,
04124681 1436 u8 *randomizer)
2763eda6
SJ		 1437{
1438 struct oob_data *data;
1439
1440 data = hci_find_remote_oob_data(hdev, bdaddr);
1441
1442 if (!data) {
1443 data = kmalloc(sizeof(*data), GFP_ATOMIC);
1444 if (!data)
1445 return -ENOMEM;
1446
1447 bacpy(&data->bdaddr, bdaddr);
1448 list_add(&data->list, &hdev->remote_oob_data);
1449 }
1450
1451 memcpy(data->hash, hash, sizeof(data->hash));
1452 memcpy(data->randomizer, randomizer, sizeof(data->randomizer));
1453
1454 BT_DBG("%s for %s", hdev->name, batostr(bdaddr));
1455
1456 return 0;
1457}
1458
04124681 1459struct bdaddr_list *hci_blacklist_lookup(struct hci_dev *hdev, bdaddr_t *bdaddr)
b2a66aad 1460{
8035ded4 1461 struct bdaddr_list *b;
b2a66aad 1462
8035ded4 1463 list_for_each_entry(b, &hdev->blacklist, list)
b2a66aad
AJ		 1464 if (bacmp(bdaddr, &b->bdaddr) == 0)
1465 return b;
b2a66aad
AJ		 1466
1467 return NULL;
1468}
1469
1470int hci_blacklist_clear(struct hci_dev *hdev)
1471{
1472 struct list_head *p, *n;
1473
1474 list_for_each_safe(p, n, &hdev->blacklist) {
1475 struct bdaddr_list *b;
1476
1477 b = list_entry(p, struct bdaddr_list, list);
1478
1479 list_del(p);
1480 kfree(b);
1481 }
1482
1483 return 0;
1484}
1485
88c1fe4b 1486int hci_blacklist_add(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1487{
1488 struct bdaddr_list *entry;
b2a66aad
AJ		 1489
1490 if (bacmp(bdaddr, BDADDR_ANY) == 0)
1491 return -EBADF;
1492
5e762444
AJ		 1493 if (hci_blacklist_lookup(hdev, bdaddr))
1494 return -EEXIST;
b2a66aad
AJ		 1495
1496 entry = kzalloc(sizeof(struct bdaddr_list), GFP_KERNEL);
5e762444
AJ		 1497 if (!entry)
1498 return -ENOMEM;
b2a66aad
AJ		 1499
1500 bacpy(&entry->bdaddr, bdaddr);
1501
1502 list_add(&entry->list, &hdev->blacklist);
1503
88c1fe4b 1504 return mgmt_device_blocked(hdev, bdaddr, type);
b2a66aad
AJ		 1505}
1506
88c1fe4b 1507int hci_blacklist_del(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 type)
b2a66aad
AJ		 1508{
1509 struct bdaddr_list *entry;
b2a66aad 1510
1ec918ce 1511 if (bacmp(bdaddr, BDADDR_ANY) == 0)
5e762444 1512 return hci_blacklist_clear(hdev);
b2a66aad
AJ		 1513
1514 entry = hci_blacklist_lookup(hdev, bdaddr);
1ec918ce 1515 if (!entry)
5e762444 1516 return -ENOENT;
b2a66aad
AJ		 1517
1518 list_del(&entry->list);
1519 kfree(entry);
1520
88c1fe4b 1521 return mgmt_device_unblocked(hdev, bdaddr, type);
b2a66aad
AJ		 1522}
1523
db323f2f 1524static void hci_clear_adv_cache(struct work_struct *work)
35815085 1525{
db323f2f 1526 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1527 adv_work.work);
35815085
AG		 1528
1529 hci_dev_lock(hdev);
1530
1531 hci_adv_entries_clear(hdev);
1532
1533 hci_dev_unlock(hdev);
1534}
1535
76c8686f
AG		 1536int hci_adv_entries_clear(struct hci_dev *hdev)
1537{
1538 struct adv_entry *entry, *tmp;
1539
1540 list_for_each_entry_safe(entry, tmp, &hdev->adv_entries, list) {
1541 list_del(&entry->list);
1542 kfree(entry);
1543 }
1544
1545 BT_DBG("%s adv cache cleared", hdev->name);
1546
1547 return 0;
1548}
1549
1550struct adv_entry *hci_find_adv_entry(struct hci_dev *hdev, bdaddr_t *bdaddr)
1551{
1552 struct adv_entry *entry;
1553
1554 list_for_each_entry(entry, &hdev->adv_entries, list)
1555 if (bacmp(bdaddr, &entry->bdaddr) == 0)
1556 return entry;
1557
1558 return NULL;
1559}
1560
1561static inline int is_connectable_adv(u8 evt_type)
1562{
1563 if (evt_type == ADV_IND || evt_type == ADV_DIRECT_IND)
1564 return 1;
1565
1566 return 0;
1567}
1568
1569int hci_add_adv_entry(struct hci_dev *hdev,
04124681 1570 struct hci_ev_le_advertising_info *ev) { struct adv_entry *entry; if (!is_connectable_adv(ev->evt_type))
76c8686f
AG		 1571 return -EINVAL;
1572
1573 /* Only new entries should be added to adv_entries. So, if
1574 * bdaddr was found, don't add it. */
1575 if (hci_find_adv_entry(hdev, &ev->bdaddr))
1576 return 0;
1577
4777bfde 1578 entry = kzalloc(sizeof(*entry), GFP_KERNEL);
76c8686f
AG		 1579 if (!entry)
1580 return -ENOMEM;
1581
1582 bacpy(&entry->bdaddr, &ev->bdaddr);
1583 entry->bdaddr_type = ev->bdaddr_type;
1584
1585 list_add(&entry->list, &hdev->adv_entries);
1586
1587 BT_DBG("%s adv entry added: address %s type %u", hdev->name,
1588 batostr(&entry->bdaddr), entry->bdaddr_type);
1589
1590 return 0;
1591}
1592
7ba8b4be
AG		 1593static void le_scan_param_req(struct hci_dev *hdev, unsigned long opt)
1594{
1595 struct le_scan_params *param = (struct le_scan_params *) opt;
1596 struct hci_cp_le_set_scan_param cp;
1597
1598 memset(&cp, 0, sizeof(cp));
1599 cp.type = param->type;
1600 cp.interval = cpu_to_le16(param->interval);
1601 cp.window = cpu_to_le16(param->window);
1602
1603 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_PARAM, sizeof(cp), &cp);
1604}
1605
1606static void le_scan_enable_req(struct hci_dev *hdev, unsigned long opt)
1607{
1608 struct hci_cp_le_set_scan_enable cp;
1609
1610 memset(&cp, 0, sizeof(cp));
1611 cp.enable = 1;
1612
1613 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1614}
1615
1616static int hci_do_le_scan(struct hci_dev *hdev, u8 type, u16 interval,
04124681 1617 u16 window, int timeout)
7ba8b4be
AG		 1618{
1619 long timeo = msecs_to_jiffies(3000);
1620 struct le_scan_params param;
1621 int err;
1622
1623 BT_DBG("%s", hdev->name);
1624
1625 if (test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1626 return -EINPROGRESS;
1627
1628 param.type = type;
1629 param.interval = interval;
1630 param.window = window;
1631
1632 hci_req_lock(hdev);
1633
1634 err = __hci_request(hdev, le_scan_param_req, (unsigned long) &param,
04124681 1635 timeo);
7ba8b4be
AG		 1636 if (!err)
1637 err = __hci_request(hdev, le_scan_enable_req, 0, timeo);
1638
1639 hci_req_unlock(hdev);
1640
1641 if (err < 0)
1642 return err;
1643
1644 schedule_delayed_work(&hdev->le_scan_disable,
04124681 1645 msecs_to_jiffies(timeout));
7ba8b4be
AG		 1646
1647 return 0;
1648}
1649
7dbfac1d
AG		 1650int hci_cancel_le_scan(struct hci_dev *hdev)
1651{
1652 BT_DBG("%s", hdev->name);
1653
1654 if (!test_bit(HCI_LE_SCAN, &hdev->dev_flags))
1655 return -EALREADY;
1656
1657 if (cancel_delayed_work(&hdev->le_scan_disable)) {
1658 struct hci_cp_le_set_scan_enable cp;
1659
1660 /* Send HCI command to disable LE Scan */
1661 memset(&cp, 0, sizeof(cp));
1662 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1663 }
1664
1665 return 0;
1666}
1667
7ba8b4be
AG		 1668static void le_scan_disable_work(struct work_struct *work)
1669{
1670 struct hci_dev *hdev = container_of(work, struct hci_dev,
04124681 1671 le_scan_disable.work);
7ba8b4be
AG		 1672 struct hci_cp_le_set_scan_enable cp;
1673
1674 BT_DBG("%s", hdev->name);
1675
1676 memset(&cp, 0, sizeof(cp));
1677
1678 hci_send_cmd(hdev, HCI_OP_LE_SET_SCAN_ENABLE, sizeof(cp), &cp);
1679}
1680
28b75a89
AG		 1681static void le_scan_work(struct work_struct *work)
1682{
1683 struct hci_dev *hdev = container_of(work, struct hci_dev, le_scan);
1684 struct le_scan_params *param = &hdev->le_scan_params;
1685
1686 BT_DBG("%s", hdev->name);
1687
04124681
GP		 1688 hci_do_le_scan(hdev, param->type, param->interval, param->window,
1689 param->timeout);
28b75a89
AG		 1690}
1691
1692int hci_le_scan(struct hci_dev *hdev, u8 type, u16 interval, u16 window,
04124681 1693 int timeout)
28b75a89
AG		 1694{
1695 struct le_scan_params *param = &hdev->le_scan_params;
1696
1697 BT_DBG("%s", hdev->name);
1698
1699 if (work_busy(&hdev->le_scan))
1700 return -EINPROGRESS;
1701
1702 param->type = type;
1703 param->interval = interval;
1704 param->window = window;
1705 param->timeout = timeout;
1706
1707 queue_work(system_long_wq, &hdev->le_scan);
1708
1709 return 0;
1710}
1711
9be0dab7
DH		 1712/* Alloc HCI device */
1713struct hci_dev *hci_alloc_dev(void)
1714{
1715 struct hci_dev *hdev;
1716
1717 hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
1718 if (!hdev)
1719 return NULL;
1720
b1b813d4
DH		 1721 hdev->pkt_type = (HCI_DM1 | HCI_DH1 | HCI_HV1);
1722 hdev->esco_type = (ESCO_HV1);
1723 hdev->link_mode = (HCI_LM_ACCEPT);
1724 hdev->io_capability = 0x03; /* No Input No Output */
1725
b1b813d4
DH		 1726 hdev->sniff_max_interval = 800;
1727 hdev->sniff_min_interval = 80;
1728
1729 mutex_init(&hdev->lock);
1730 mutex_init(&hdev->req_lock);
1731
1732 INIT_LIST_HEAD(&hdev->mgmt_pending);
1733 INIT_LIST_HEAD(&hdev->blacklist);
1734 INIT_LIST_HEAD(&hdev->uuids);
1735 INIT_LIST_HEAD(&hdev->link_keys);
1736 INIT_LIST_HEAD(&hdev->long_term_keys);
1737 INIT_LIST_HEAD(&hdev->remote_oob_data);
1738 INIT_LIST_HEAD(&hdev->adv_entries);
1739
1740 INIT_WORK(&hdev->rx_work, hci_rx_work);
1741 INIT_WORK(&hdev->cmd_work, hci_cmd_work);
1742 INIT_WORK(&hdev->tx_work, hci_tx_work);
1743 INIT_WORK(&hdev->power_on, hci_power_on);
1744 INIT_WORK(&hdev->le_scan, le_scan_work);
1745
1746 INIT_DELAYED_WORK(&hdev->adv_work, hci_clear_adv_cache);
1747 INIT_DELAYED_WORK(&hdev->power_off, hci_power_off);
1748 INIT_DELAYED_WORK(&hdev->discov_off, hci_discov_off);
1749 INIT_DELAYED_WORK(&hdev->le_scan_disable, le_scan_disable_work);
1750
9be0dab7 1751 skb_queue_head_init(&hdev->driver_init);
b1b813d4
DH		 1752 skb_queue_head_init(&hdev->rx_q);
1753 skb_queue_head_init(&hdev->cmd_q);
1754 skb_queue_head_init(&hdev->raw_q);
1755
1756 init_waitqueue_head(&hdev->req_wait_q);
1757
1758 setup_timer(&hdev->cmd_timer, hci_cmd_timer, (unsigned long) hdev);
1759
b1b813d4
DH		 1760 hci_init_sysfs(hdev);
1761 discovery_init(hdev);
1762 hci_conn_hash_init(hdev);
9be0dab7
DH		 1763
1764 return hdev;
1765}
1766EXPORT_SYMBOL(hci_alloc_dev);
1767
1768/* Free HCI device */
1769void hci_free_dev(struct hci_dev *hdev)
1770{
1771 skb_queue_purge(&hdev->driver_init);
1772
1773 /* will free via device release */
1774 put_device(&hdev->dev);
1775}
1776EXPORT_SYMBOL(hci_free_dev);
1777
1da177e4
LT		 1778/* Register HCI device */
1779int hci_register_dev(struct hci_dev *hdev)
1780{
fc50744c 1781 struct list_head *head, *p;
b1b813d4 1782 int id, error;
1da177e4 1783
010666a1 1784 if (!hdev->open || !hdev->close)
1da177e4
LT		 1785 return -EINVAL;
1786
fc50744c
UF		 1787 write_lock(&hci_dev_list_lock);
1788
08add513
MM		 1789 /* Do not allow HCI_AMP devices to register at index 0,
1790 * so the index can be used as the AMP controller ID.
1791 */
1792 id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;
fc50744c 1793 head = &hci_dev_list;
1da177e4
LT		 1794
1795 /* Find first available device id */
1796 list_for_each(p, &hci_dev_list) {
fc50744c
UF		 1797 int nid = list_entry(p, struct hci_dev, list)->id;
1798 if (nid > id)
1da177e4 1799 break;
fc50744c
UF		 1800 if (nid == id)
1801 id++;
1802 head = p;
1da177e4 1803 }
8e87d142 1804
1da177e4
LT		 1805 sprintf(hdev->name, "hci%d", id);
1806 hdev->id = id;
2d8b3a11
AE		 1807
1808 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1809
fc50744c 1810 list_add(&hdev->list, head);
1da177e4 1811
f20d09d5 1812 write_unlock(&hci_dev_list_lock);
1da177e4 1813
32845eb1
GP		 1814 hdev->workqueue = alloc_workqueue(hdev->name, WQ_HIGHPRI | WQ_UNBOUND |
1815 WQ_MEM_RECLAIM, 1);
33ca954d
DH		 1816 if (!hdev->workqueue) {
1817 error = -ENOMEM;
1818 goto err;
1819 }
f48fd9c8 1820
33ca954d
DH		 1821 error = hci_add_sysfs(hdev);
1822 if (error < 0)
1823 goto err_wqueue;
1da177e4 1824
611b30f7
MH		 1825 hdev->rfkill = rfkill_alloc(hdev->name, &hdev->dev,
1826 RFKILL_TYPE_BLUETOOTH, &hci_rfkill_ops, hdev);
1827 if (hdev->rfkill) {
1828 if (rfkill_register(hdev->rfkill) < 0) {
1829 rfkill_destroy(hdev->rfkill);
1830 hdev->rfkill = NULL;
1831 }
1832 }
1833
a8b2d5c2
JH		 1834 set_bit(HCI_AUTO_OFF, &hdev->dev_flags);
1835 set_bit(HCI_SETUP, &hdev->dev_flags);
7f971041 1836 schedule_work(&hdev->power_on);
ab81cbf9 1837
1da177e4 1838 hci_notify(hdev, HCI_DEV_REG);
dc946bd8 1839 hci_dev_hold(hdev);
1da177e4
LT		 1840
1841 return id;
f48fd9c8 1842
33ca954d
DH		 1843err_wqueue:
1844 destroy_workqueue(hdev->workqueue);
1845err:
f20d09d5 1846 write_lock(&hci_dev_list_lock);
f48fd9c8 1847 list_del(&hdev->list);
f20d09d5 1848 write_unlock(&hci_dev_list_lock);
f48fd9c8 1849
33ca954d 1850 return error;
1da177e4
LT		 1851}
1852EXPORT_SYMBOL(hci_register_dev);
1853
1854/* Unregister HCI device */
59735631 1855void hci_unregister_dev(struct hci_dev *hdev)
1da177e4 1856{
ef222013
MH		 1857 int i;
1858
c13854ce 1859 BT_DBG("%p name %s bus %d", hdev, hdev->name, hdev->bus);
1da177e4 1860
94324962
JH		 1861 set_bit(HCI_UNREGISTER, &hdev->dev_flags);
1862
f20d09d5 1863 write_lock(&hci_dev_list_lock);
1da177e4 1864 list_del(&hdev->list);
f20d09d5 1865 write_unlock(&hci_dev_list_lock);
1da177e4
LT		 1866
1867 hci_dev_do_close(hdev);
1868
cd4c5391 1869 for (i = 0; i < NUM_REASSEMBLY; i++)
ef222013
MH		 1870 kfree_skb(hdev->reassembly[i]);
1871
ab81cbf9 1872 if (!test_bit(HCI_INIT, &hdev->flags) &&
a8b2d5c2 1873 !test_bit(HCI_SETUP, &hdev->dev_flags)) {
09fd0de5 1874 hci_dev_lock(hdev);
744cf19e 1875 mgmt_index_removed(hdev);
09fd0de5 1876 hci_dev_unlock(hdev);
56e5cb86 1877 }
ab81cbf9 1878
2e58ef3e
JH		 1879 /* mgmt_index_removed should take care of emptying the
1880 * pending list */
1881 BUG_ON(!list_empty(&hdev->mgmt_pending));
1882
1da177e4
LT		 1883 hci_notify(hdev, HCI_DEV_UNREG);
1884
611b30f7
MH		 1885 if (hdev->rfkill) {
1886 rfkill_unregister(hdev->rfkill);
1887 rfkill_destroy(hdev->rfkill);
1888 }
1889
ce242970 1890 hci_del_sysfs(hdev);
147e2d59 1891
db323f2f 1892 cancel_delayed_work_sync(&hdev->adv_work);
c6f3c5f7 1893
f48fd9c8
MH		 1894 destroy_workqueue(hdev->workqueue);
1895
09fd0de5 1896 hci_dev_lock(hdev);
e2e0cacb 1897 hci_blacklist_clear(hdev);
2aeb9a1a 1898 hci_uuids_clear(hdev);
55ed8ca1 1899 hci_link_keys_clear(hdev);
b899efaf 1900 hci_smp_ltks_clear(hdev);
2763eda6 1901 hci_remote_oob_data_clear(hdev);
76c8686f 1902 hci_adv_entries_clear(hdev);
09fd0de5 1903 hci_dev_unlock(hdev);
e2e0cacb 1904
dc946bd8 1905 hci_dev_put(hdev);
1da177e4
LT		 1906}
1907EXPORT_SYMBOL(hci_unregister_dev);
1908
1909/* Suspend HCI device */
1910int hci_suspend_dev(struct hci_dev *hdev)
1911{
1912 hci_notify(hdev, HCI_DEV_SUSPEND);
1913 return 0;
1914}
1915EXPORT_SYMBOL(hci_suspend_dev);
1916
1917/* Resume HCI device */
1918int hci_resume_dev(struct hci_dev *hdev)
1919{
1920 hci_notify(hdev, HCI_DEV_RESUME);
1921 return 0;
1922}
1923EXPORT_SYMBOL(hci_resume_dev);
1924
76bca880
MH		 1925/* Receive frame from HCI drivers */
1926int hci_recv_frame(struct sk_buff *skb)
1927{
1928 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
1929 if (!hdev || (!test_bit(HCI_UP, &hdev->flags)
1930 && !test_bit(HCI_INIT, &hdev->flags))) {
1931 kfree_skb(skb);
1932 return -ENXIO;
1933 }
1934
1935 /* Incomming skb */
1936 bt_cb(skb)->incoming = 1;
1937
1938 /* Time stamp */
1939 __net_timestamp(skb);
1940
76bca880 1941 skb_queue_tail(&hdev->rx_q, skb);
b78752cc 1942 queue_work(hdev->workqueue, &hdev->rx_work);
c78ae283 1943
76bca880
MH		 1944 return 0;
1945}
1946EXPORT_SYMBOL(hci_recv_frame);
1947
33e882a5 1948static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
1e429f38 1949 int count, __u8 index)
33e882a5
SS		 1950{
1951 int len = 0;
1952 int hlen = 0;
1953 int remain = count;
1954 struct sk_buff *skb;
1955 struct bt_skb_cb *scb;
1956
1957 if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
1958 index >= NUM_REASSEMBLY)
1959 return -EILSEQ;
1960
1961 skb = hdev->reassembly[index];
1962
1963 if (!skb) {
1964 switch (type) {
1965 case HCI_ACLDATA_PKT:
1966 len = HCI_MAX_FRAME_SIZE;
1967 hlen = HCI_ACL_HDR_SIZE;
1968 break;
1969 case HCI_EVENT_PKT:
1970 len = HCI_MAX_EVENT_SIZE;
1971 hlen = HCI_EVENT_HDR_SIZE;
1972 break;
1973 case HCI_SCODATA_PKT:
1974 len = HCI_MAX_SCO_SIZE;
1975 hlen = HCI_SCO_HDR_SIZE;
1976 break;
1977 }
1978
1e429f38 1979 skb = bt_skb_alloc(len, GFP_ATOMIC);
33e882a5
SS		 1980 if (!skb)
1981 return -ENOMEM;
1982
1983 scb = (void *) skb->cb;
1984 scb->expect = hlen;
1985 scb->pkt_type = type;
1986
1987 skb->dev = (void *) hdev;
1988 hdev->reassembly[index] = skb;
1989 }
1990
1991 while (count) {
1992 scb = (void *) skb->cb;
89bb46d0 1993 len = min_t(uint, scb->expect, count);
33e882a5
SS		 1994
1995 memcpy(skb_put(skb, len), data, len);
1996
1997 count -= len;
1998 data += len;
1999 scb->expect -= len;
2000 remain = count;
2001
2002 switch (type) {
2003 case HCI_EVENT_PKT:
2004 if (skb->len == HCI_EVENT_HDR_SIZE) {
2005 struct hci_event_hdr *h = hci_event_hdr(skb);
2006 scb->expect = h->plen;
2007
2008 if (skb_tailroom(skb) < scb->expect) {
2009 kfree_skb(skb);
2010 hdev->reassembly[index] = NULL;
2011 return -ENOMEM;
2012 }
2013 }
2014 break;
2015
2016 case HCI_ACLDATA_PKT:
2017 if (skb->len == HCI_ACL_HDR_SIZE) {
2018 struct hci_acl_hdr *h = hci_acl_hdr(skb);
2019 scb->expect = __le16_to_cpu(h->dlen);
2020
2021 if (skb_tailroom(skb) < scb->expect) {
2022 kfree_skb(skb);
2023 hdev->reassembly[index] = NULL;
2024 return -ENOMEM;
2025 }
2026 }
2027 break;
2028
2029 case HCI_SCODATA_PKT:
2030 if (skb->len == HCI_SCO_HDR_SIZE) {
2031 struct hci_sco_hdr *h = hci_sco_hdr(skb);
2032 scb->expect = h->dlen;
2033
2034 if (skb_tailroom(skb) < scb->expect) {
2035 kfree_skb(skb);
2036 hdev->reassembly[index] = NULL;
2037 return -ENOMEM;
2038 }
2039 }
2040 break;
2041 }
2042
2043 if (scb->expect == 0) {
2044 /* Complete frame */
2045
2046 bt_cb(skb)->pkt_type = type;
2047 hci_recv_frame(skb);
2048
2049 hdev->reassembly[index] = NULL;
2050 return remain;
2051 }
2052 }
2053
2054 return remain;
2055}
2056
ef222013
MH		 2057int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
2058{
f39a3c06
SS		 2059 int rem = 0;
2060
ef222013
MH		 2061 if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
2062 return -EILSEQ;
2063
da5f6c37 2064 while (count) {
1e429f38 2065 rem = hci_reassembly(hdev, type, data, count, type - 1);
f39a3c06
SS		 2066 if (rem < 0)
2067 return rem;
ef222013 2068
f39a3c06
SS		 2069 data += (count - rem);
2070 count = rem;
f81c6224 2071 }
ef222013 2072
f39a3c06 2073 return rem;
ef222013
MH		 2074}
2075EXPORT_SYMBOL(hci_recv_fragment);
2076
99811510
SS		 2077#define STREAM_REASSEMBLY 0
2078
2079int hci_recv_stream_fragment(struct hci_dev *hdev, void *data, int count)
2080{
2081 int type;
2082 int rem = 0;
2083
da5f6c37 2084 while (count) {
99811510
SS		 2085 struct sk_buff *skb = hdev->reassembly[STREAM_REASSEMBLY];
2086
2087 if (!skb) {
2088 struct { char type; } *pkt;
2089
2090 /* Start of the frame */
2091 pkt = data;
2092 type = pkt->type;
2093
2094 data++;
2095 count--;
2096 } else
2097 type = bt_cb(skb)->pkt_type;
2098
1e429f38
GP		 2099 rem = hci_reassembly(hdev, type, data, count,
2100 STREAM_REASSEMBLY);
99811510
SS		 2101 if (rem < 0)
2102 return rem;
2103
2104 data += (count - rem);
2105 count = rem;
f81c6224 2106 }
99811510
SS		 2107
2108 return rem;
2109}
2110EXPORT_SYMBOL(hci_recv_stream_fragment);
2111
1da177e4
LT		 2112/* ---- Interface to upper protocols ---- */
2113
1da177e4
LT		 2114int hci_register_cb(struct hci_cb *cb)
2115{
2116 BT_DBG("%p name %s", cb, cb->name);
2117
f20d09d5 2118 write_lock(&hci_cb_list_lock);
1da177e4 2119 list_add(&cb->list, &hci_cb_list);
f20d09d5 2120 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2121
2122 return 0;
2123}
2124EXPORT_SYMBOL(hci_register_cb);
2125
2126int hci_unregister_cb(struct hci_cb *cb)
2127{
2128 BT_DBG("%p name %s", cb, cb->name);
2129
f20d09d5 2130 write_lock(&hci_cb_list_lock);
1da177e4 2131 list_del(&cb->list);
f20d09d5 2132 write_unlock(&hci_cb_list_lock);
1da177e4
LT		 2133
2134 return 0;
2135}
2136EXPORT_SYMBOL(hci_unregister_cb);
2137
2138static int hci_send_frame(struct sk_buff *skb)
2139{
2140 struct hci_dev *hdev = (struct hci_dev *) skb->dev;
2141
2142 if (!hdev) {
2143 kfree_skb(skb);
2144 return -ENODEV;
2145 }
2146
0d48d939 2147 BT_DBG("%s type %d len %d", hdev->name, bt_cb(skb)->pkt_type, skb->len);
1da177e4 2148
cd82e61c
MH		 2149 /* Time stamp */
2150 __net_timestamp(skb);
1da177e4 2151
cd82e61c
MH		 2152 /* Send copy to monitor */
2153 hci_send_to_monitor(hdev, skb);
2154
2155 if (atomic_read(&hdev->promisc)) {
2156 /* Send copy to the sockets */
470fe1b5 2157 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2158 }
2159
2160 /* Get rid of skb owner, prior to sending to the driver. */
2161 skb_orphan(skb);
2162
2163 return hdev->send(skb);
2164}
2165
2166/* Send HCI command */
a9de9248 2167int hci_send_cmd(struct hci_dev *hdev, __u16 opcode, __u32 plen, void *param)
1da177e4
LT		 2168{
2169 int len = HCI_COMMAND_HDR_SIZE + plen;
2170 struct hci_command_hdr *hdr;
2171 struct sk_buff *skb;
2172
a9de9248 2173 BT_DBG("%s opcode 0x%x plen %d", hdev->name, opcode, plen);
1da177e4
LT		 2174
2175 skb = bt_skb_alloc(len, GFP_ATOMIC);
2176 if (!skb) {
ef222013 2177 BT_ERR("%s no memory for command", hdev->name);
1da177e4
LT		 2178 return -ENOMEM;
2179 }
2180
2181 hdr = (struct hci_command_hdr *) skb_put(skb, HCI_COMMAND_HDR_SIZE);
a9de9248 2182 hdr->opcode = cpu_to_le16(opcode);
1da177e4
LT		 2183 hdr->plen = plen;
2184
2185 if (plen)
2186 memcpy(skb_put(skb, plen), param, plen);
2187
2188 BT_DBG("skb len %d", skb->len);
2189
0d48d939 2190 bt_cb(skb)->pkt_type = HCI_COMMAND_PKT;
1da177e4 2191 skb->dev = (void *) hdev;
c78ae283 2192
a5040efa
JH		 2193 if (test_bit(HCI_INIT, &hdev->flags))
2194 hdev->init_last_cmd = opcode;
2195
1da177e4 2196 skb_queue_tail(&hdev->cmd_q, skb);
c347b765 2197 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2198
2199 return 0;
2200}
1da177e4
LT		 2201
2202/* Get data from the previously sent command */
a9de9248 2203void *hci_sent_cmd_data(struct hci_dev *hdev, __u16 opcode)
1da177e4
LT		 2204{
2205 struct hci_command_hdr *hdr;
2206
2207 if (!hdev->sent_cmd)
2208 return NULL;
2209
2210 hdr = (void *) hdev->sent_cmd->data;
2211
a9de9248 2212 if (hdr->opcode != cpu_to_le16(opcode))
1da177e4
LT		 2213 return NULL;
2214
a9de9248 2215 BT_DBG("%s opcode 0x%x", hdev->name, opcode);
1da177e4
LT		 2216
2217 return hdev->sent_cmd->data + HCI_COMMAND_HDR_SIZE;
2218}
2219
2220/* Send ACL data */
2221static void hci_add_acl_hdr(struct sk_buff *skb, __u16 handle, __u16 flags)
2222{
2223 struct hci_acl_hdr *hdr;
2224 int len = skb->len;
2225
badff6d0
ACM		 2226 skb_push(skb, HCI_ACL_HDR_SIZE);
2227 skb_reset_transport_header(skb);
9c70220b 2228 hdr = (struct hci_acl_hdr *)skb_transport_header(skb);
aca3192c
YH		 2229 hdr->handle = cpu_to_le16(hci_handle_pack(handle, flags));
2230 hdr->dlen = cpu_to_le16(len);
1da177e4
LT		 2231}
2232
73d80deb
LAD		 2233static void hci_queue_acl(struct hci_conn *conn, struct sk_buff_head *queue,
2234 struct sk_buff *skb, __u16 flags)
1da177e4
LT		 2235{
2236 struct hci_dev *hdev = conn->hdev;
2237 struct sk_buff *list;
2238
70f23020
AE		 2239 list = skb_shinfo(skb)->frag_list;
2240 if (!list) {
1da177e4
LT		 2241 /* Non fragmented */
2242 BT_DBG("%s nonfrag skb %p len %d", hdev->name, skb, skb->len);
2243
73d80deb 2244 skb_queue_tail(queue, skb);
1da177e4
LT		 2245 } else {
2246 /* Fragmented */
2247 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2248
2249 skb_shinfo(skb)->frag_list = NULL;
2250
2251 /* Queue all fragments atomically */
af3e6359 2252 spin_lock(&queue->lock);
1da177e4 2253
73d80deb 2254 __skb_queue_tail(queue, skb);
e702112f
AE		 2255
2256 flags &= ~ACL_START;
2257 flags |= ACL_CONT;
1da177e4
LT		 2258 do {
2259 skb = list; list = list->next;
8e87d142 2260
1da177e4 2261 skb->dev = (void *) hdev;
0d48d939 2262 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
e702112f 2263 hci_add_acl_hdr(skb, conn->handle, flags);
1da177e4
LT		 2264
2265 BT_DBG("%s frag %p len %d", hdev->name, skb, skb->len);
2266
73d80deb 2267 __skb_queue_tail(queue, skb);
1da177e4
LT		 2268 } while (list);
2269
af3e6359 2270 spin_unlock(&queue->lock);
1da177e4 2271 }
73d80deb
LAD		 2272}
2273
2274void hci_send_acl(struct hci_chan *chan, struct sk_buff *skb, __u16 flags)
2275{
2276 struct hci_conn *conn = chan->conn;
2277 struct hci_dev *hdev = conn->hdev;
2278
2279 BT_DBG("%s chan %p flags 0x%x", hdev->name, chan, flags);
2280
2281 skb->dev = (void *) hdev;
2282 bt_cb(skb)->pkt_type = HCI_ACLDATA_PKT;
2283 hci_add_acl_hdr(skb, conn->handle, flags);
2284
2285 hci_queue_acl(conn, &chan->data_q, skb, flags);
1da177e4 2286
3eff45ea 2287 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2288}
2289EXPORT_SYMBOL(hci_send_acl);
2290
2291/* Send SCO data */
0d861d8b 2292void hci_send_sco(struct hci_conn *conn, struct sk_buff *skb)
1da177e4
LT		 2293{
2294 struct hci_dev *hdev = conn->hdev;
2295 struct hci_sco_hdr hdr;
2296
2297 BT_DBG("%s len %d", hdev->name, skb->len);
2298
aca3192c 2299 hdr.handle = cpu_to_le16(conn->handle);
1da177e4
LT		 2300 hdr.dlen = skb->len;
2301
badff6d0
ACM		 2302 skb_push(skb, HCI_SCO_HDR_SIZE);
2303 skb_reset_transport_header(skb);
9c70220b 2304 memcpy(skb_transport_header(skb), &hdr, HCI_SCO_HDR_SIZE);
1da177e4
LT		 2305
2306 skb->dev = (void *) hdev;
0d48d939 2307 bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
c78ae283 2308
1da177e4 2309 skb_queue_tail(&conn->data_q, skb);
3eff45ea 2310 queue_work(hdev->workqueue, &hdev->tx_work);
1da177e4
LT		 2311}
2312EXPORT_SYMBOL(hci_send_sco);
2313
2314/* ---- HCI TX task (outgoing data) ---- */
2315
2316/* HCI Connection scheduler */
2317static inline struct hci_conn *hci_low_sent(struct hci_dev *hdev, __u8 type, int *quote)
2318{
2319 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2320 struct hci_conn *conn = NULL, *c;
abc5de8f 2321 unsigned int num = 0, min = ~0;
1da177e4 2322
8e87d142 2323 /* We don't have to lock device here. Connections are always
1da177e4 2324 * added and removed with TX task disabled. */
bf4c6325
GP		 2325
2326 rcu_read_lock();
2327
2328 list_for_each_entry_rcu(c, &h->list, list) {
769be974 2329 if (c->type != type || skb_queue_empty(&c->data_q))
1da177e4 2330 continue;
769be974
MH		 2331
2332 if (c->state != BT_CONNECTED && c->state != BT_CONFIG)
2333 continue;
2334
1da177e4
LT		 2335 num++;
2336
2337 if (c->sent < min) {
2338 min = c->sent;
2339 conn = c;
2340 }
52087a79
LAD		 2341
2342 if (hci_conn_num(hdev, type) == num)
2343 break;
1da177e4
LT		 2344 }
2345
bf4c6325
GP		 2346 rcu_read_unlock();
2347
1da177e4 2348 if (conn) {
6ed58ec5
VT		 2349 int cnt, q;
2350
2351 switch (conn->type) {
2352 case ACL_LINK:
2353 cnt = hdev->acl_cnt;
2354 break;
2355 case SCO_LINK:
2356 case ESCO_LINK:
2357 cnt = hdev->sco_cnt;
2358 break;
2359 case LE_LINK:
2360 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2361 break;
2362 default:
2363 cnt = 0;
2364 BT_ERR("Unknown link type");
2365 }
2366
2367 q = cnt / num;
1da177e4
LT		 2368 *quote = q ? q : 1;
2369 } else
2370 *quote = 0;
2371
2372 BT_DBG("conn %p quote %d", conn, *quote);
2373 return conn;
2374}
2375
bae1f5d9 2376static inline void hci_link_tx_to(struct hci_dev *hdev, __u8 type)
1da177e4
LT		 2377{
2378 struct hci_conn_hash *h = &hdev->conn_hash;
8035ded4 2379 struct hci_conn *c;
1da177e4 2380
bae1f5d9 2381 BT_ERR("%s link tx timeout", hdev->name);
1da177e4 2382
bf4c6325
GP		 2383 rcu_read_lock();
2384
1da177e4 2385 /* Kill stalled connections */
bf4c6325 2386 list_for_each_entry_rcu(c, &h->list, list) {
bae1f5d9
VT		 2387 if (c->type == type && c->sent) {
2388 BT_ERR("%s killing stalled connection %s",
1da177e4
LT		 2389 hdev->name, batostr(&c->dst));
2390 hci_acl_disconn(c, 0x13);
2391 }
2392 }
bf4c6325
GP		 2393
2394 rcu_read_unlock();
1da177e4
LT		 2395}
2396
73d80deb
LAD		 2397static inline struct hci_chan *hci_chan_sent(struct hci_dev *hdev, __u8 type,
2398 int *quote)
1da177e4 2399{
73d80deb
LAD		 2400 struct hci_conn_hash *h = &hdev->conn_hash;
2401 struct hci_chan *chan = NULL;
abc5de8f 2402 unsigned int num = 0, min = ~0, cur_prio = 0;
1da177e4 2403 struct hci_conn *conn;
73d80deb
LAD		 2404 int cnt, q, conn_num = 0;
2405
2406 BT_DBG("%s", hdev->name);
2407
bf4c6325
GP		 2408 rcu_read_lock();
2409
2410 list_for_each_entry_rcu(conn, &h->list, list) {
73d80deb
LAD		 2411 struct hci_chan *tmp;
2412
2413 if (conn->type != type)
2414 continue;
2415
2416 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2417 continue;
2418
2419 conn_num++;
2420
8192edef 2421 list_for_each_entry_rcu(tmp, &conn->chan_list, list) {
73d80deb
LAD		 2422 struct sk_buff *skb;
2423
2424 if (skb_queue_empty(&tmp->data_q))
2425 continue;
2426
2427 skb = skb_peek(&tmp->data_q);
2428 if (skb->priority < cur_prio)
2429 continue;
2430
2431 if (skb->priority > cur_prio) {
2432 num = 0;
2433 min = ~0;
2434 cur_prio = skb->priority;
2435 }
2436
2437 num++;
2438
2439 if (conn->sent < min) {
2440 min = conn->sent;
2441 chan = tmp;
2442 }
2443 }
2444
2445 if (hci_conn_num(hdev, type) == conn_num)
2446 break;
2447 }
2448
bf4c6325
GP		 2449 rcu_read_unlock();
2450
73d80deb
LAD		 2451 if (!chan)
2452 return NULL;
2453
2454 switch (chan->conn->type) {
2455 case ACL_LINK:
2456 cnt = hdev->acl_cnt;
2457 break;
2458 case SCO_LINK:
2459 case ESCO_LINK:
2460 cnt = hdev->sco_cnt;
2461 break;
2462 case LE_LINK:
2463 cnt = hdev->le_mtu ? hdev->le_cnt : hdev->acl_cnt;
2464 break;
2465 default:
2466 cnt = 0;
2467 BT_ERR("Unknown link type");
2468 }
2469
2470 q = cnt / num;
2471 *quote = q ? q : 1;
2472 BT_DBG("chan %p quote %d", chan, *quote);
2473 return chan;
2474}
2475
02b20f0b
LAD		 2476static void hci_prio_recalculate(struct hci_dev *hdev, __u8 type)
2477{
2478 struct hci_conn_hash *h = &hdev->conn_hash;
2479 struct hci_conn *conn;
2480 int num = 0;
2481
2482 BT_DBG("%s", hdev->name);
2483
bf4c6325
GP		 2484 rcu_read_lock();
2485
2486 list_for_each_entry_rcu(conn, &h->list, list) {
02b20f0b
LAD		 2487 struct hci_chan *chan;
2488
2489 if (conn->type != type)
2490 continue;
2491
2492 if (conn->state != BT_CONNECTED && conn->state != BT_CONFIG)
2493 continue;
2494
2495 num++;
2496
8192edef 2497 list_for_each_entry_rcu(chan, &conn->chan_list, list) {
02b20f0b
LAD		 2498 struct sk_buff *skb;
2499
2500 if (chan->sent) {
2501 chan->sent = 0;
2502 continue;
2503 }
2504
2505 if (skb_queue_empty(&chan->data_q))
2506 continue;
2507
2508 skb = skb_peek(&chan->data_q);
2509 if (skb->priority >= HCI_PRIO_MAX - 1)
2510 continue;
2511
2512 skb->priority = HCI_PRIO_MAX - 1;
2513
2514 BT_DBG("chan %p skb %p promoted to %d", chan, skb,
2515 skb->priority);
2516 }
2517
2518 if (hci_conn_num(hdev, type) == num)
2519 break;
2520 }
bf4c6325
GP		 2521
2522 rcu_read_unlock();
2523
02b20f0b
LAD		 2524}
2525
b71d385a
AE		 2526static inline int __get_blocks(struct hci_dev *hdev, struct sk_buff *skb)
2527{
2528 /* Calculate count of blocks used by this packet */
2529 return DIV_ROUND_UP(skb->len - HCI_ACL_HDR_SIZE, hdev->block_len);
2530}
2531
63d2bc1b 2532static inline void __check_timeout(struct hci_dev *hdev, unsigned int cnt)
73d80deb 2533{
1da177e4
LT		 2534 if (!test_bit(HCI_RAW, &hdev->flags)) {
2535 /* ACL tx timeout must be longer than maximum
2536 * link supervision timeout (40.9 seconds) */
63d2bc1b 2537 if (!cnt && time_after(jiffies, hdev->acl_last_tx +
cc48dc0a 2538 msecs_to_jiffies(HCI_ACL_TX_TIMEOUT)))
bae1f5d9 2539 hci_link_tx_to(hdev, ACL_LINK);
1da177e4 2540 }
63d2bc1b 2541}
1da177e4 2542
63d2bc1b
AE		 2543static inline void hci_sched_acl_pkt(struct hci_dev *hdev)
2544{
2545 unsigned int cnt = hdev->acl_cnt;
2546 struct hci_chan *chan;
2547 struct sk_buff *skb;
2548 int quote;
2549
2550 __check_timeout(hdev, cnt);
04837f64 2551
73d80deb
LAD		 2552 while (hdev->acl_cnt &&
2553 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
ec1cce24
LAD		 2554 u32 priority = (skb_peek(&chan->data_q))->priority;
2555 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2556 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2557 skb->len, skb->priority);
2558
ec1cce24
LAD		 2559 /* Stop if priority has changed */
2560 if (skb->priority < priority)
2561 break;
2562
2563 skb = skb_dequeue(&chan->data_q);
2564
73d80deb 2565 hci_conn_enter_active_mode(chan->conn,
04124681 2566 bt_cb(skb)->force_active);
04837f64 2567
1da177e4
LT		 2568 hci_send_frame(skb);
2569 hdev->acl_last_tx = jiffies;
2570
2571 hdev->acl_cnt--;
73d80deb
LAD		 2572 chan->sent++;
2573 chan->conn->sent++;
1da177e4
LT		 2574 }
2575 }
02b20f0b
LAD		 2576
2577 if (cnt != hdev->acl_cnt)
2578 hci_prio_recalculate(hdev, ACL_LINK);
1da177e4
LT		 2579}
2580
b71d385a
AE		 2581static inline void hci_sched_acl_blk(struct hci_dev *hdev)
2582{
63d2bc1b 2583 unsigned int cnt = hdev->block_cnt;
b71d385a
AE		 2584 struct hci_chan *chan;
2585 struct sk_buff *skb;
2586 int quote;
b71d385a 2587
63d2bc1b 2588 __check_timeout(hdev, cnt);
b71d385a
AE		 2589
2590 while (hdev->block_cnt > 0 &&
2591 (chan = hci_chan_sent(hdev, ACL_LINK, &quote))) {
2592 u32 priority = (skb_peek(&chan->data_q))->priority;
2593 while (quote > 0 && (skb = skb_peek(&chan->data_q))) {
2594 int blocks;
2595
2596 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2597 skb->len, skb->priority);
2598
2599 /* Stop if priority has changed */
2600 if (skb->priority < priority)
2601 break;
2602
2603 skb = skb_dequeue(&chan->data_q);
2604
2605 blocks = __get_blocks(hdev, skb);
2606 if (blocks > hdev->block_cnt)
2607 return;
2608
2609 hci_conn_enter_active_mode(chan->conn,
2610 bt_cb(skb)->force_active);
2611
2612 hci_send_frame(skb);
2613 hdev->acl_last_tx = jiffies;
2614
2615 hdev->block_cnt -= blocks;
2616 quote -= blocks;
2617
2618 chan->sent += blocks;
2619 chan->conn->sent += blocks;
2620 }
2621 }
2622
2623 if (cnt != hdev->block_cnt)
2624 hci_prio_recalculate(hdev, ACL_LINK);
2625}
2626
2627static inline void hci_sched_acl(struct hci_dev *hdev)
2628{
2629 BT_DBG("%s", hdev->name);
2630
2631 if (!hci_conn_num(hdev, ACL_LINK))
2632 return;
2633
2634 switch (hdev->flow_ctl_mode) {
2635 case HCI_FLOW_CTL_MODE_PACKET_BASED:
2636 hci_sched_acl_pkt(hdev);
2637 break;
2638
2639 case HCI_FLOW_CTL_MODE_BLOCK_BASED:
2640 hci_sched_acl_blk(hdev);
2641 break;
2642 }
2643}
2644
1da177e4
LT		 2645/* Schedule SCO */
2646static inline void hci_sched_sco(struct hci_dev *hdev)
2647{
2648 struct hci_conn *conn;
2649 struct sk_buff *skb;
2650 int quote;
2651
2652 BT_DBG("%s", hdev->name);
2653
52087a79
LAD		 2654 if (!hci_conn_num(hdev, SCO_LINK))
2655 return;
2656
1da177e4
LT		 2657 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, SCO_LINK, &quote))) {
2658 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2659 BT_DBG("skb %p len %d", skb, skb->len);
2660 hci_send_frame(skb);
2661
2662 conn->sent++;
2663 if (conn->sent == ~0)
2664 conn->sent = 0;
2665 }
2666 }
2667}
2668
b6a0dc82
MH		 2669static inline void hci_sched_esco(struct hci_dev *hdev)
2670{
2671 struct hci_conn *conn;
2672 struct sk_buff *skb;
2673 int quote;
2674
2675 BT_DBG("%s", hdev->name);
2676
52087a79
LAD		 2677 if (!hci_conn_num(hdev, ESCO_LINK))
2678 return;
2679
b6a0dc82
MH		 2680 while (hdev->sco_cnt && (conn = hci_low_sent(hdev, ESCO_LINK, &quote))) {
2681 while (quote-- && (skb = skb_dequeue(&conn->data_q))) {
2682 BT_DBG("skb %p len %d", skb, skb->len);
2683 hci_send_frame(skb);
2684
2685 conn->sent++;
2686 if (conn->sent == ~0)
2687 conn->sent = 0;
2688 }
2689 }
2690}
2691
6ed58ec5
VT		 2692static inline void hci_sched_le(struct hci_dev *hdev)
2693{
73d80deb 2694 struct hci_chan *chan;
6ed58ec5 2695 struct sk_buff *skb;
02b20f0b 2696 int quote, cnt, tmp;
6ed58ec5
VT		 2697
2698 BT_DBG("%s", hdev->name);
2699
52087a79
LAD		 2700 if (!hci_conn_num(hdev, LE_LINK))
2701 return;
2702
6ed58ec5
VT		 2703 if (!test_bit(HCI_RAW, &hdev->flags)) {
2704 /* LE tx timeout must be longer than maximum
2705 * link supervision timeout (40.9 seconds) */
bae1f5d9 2706 if (!hdev->le_cnt && hdev->le_pkts &&
6ed58ec5 2707 time_after(jiffies, hdev->le_last_tx + HZ * 45))
bae1f5d9 2708 hci_link_tx_to(hdev, LE_LINK);
6ed58ec5
VT		 2709 }
2710
2711 cnt = hdev->le_pkts ? hdev->le_cnt : hdev->acl_cnt;
02b20f0b 2712 tmp = cnt;
73d80deb 2713 while (cnt && (chan = hci_chan_sent(hdev, LE_LINK, &quote))) {
ec1cce24
LAD		 2714 u32 priority = (skb_peek(&chan->data_q))->priority;
2715 while (quote-- && (skb = skb_peek(&chan->data_q))) {
73d80deb
LAD		 2716 BT_DBG("chan %p skb %p len %d priority %u", chan, skb,
2717 skb->len, skb->priority);
6ed58ec5 2718
ec1cce24
LAD		 2719 /* Stop if priority has changed */
2720 if (skb->priority < priority)
2721 break;
2722
2723 skb = skb_dequeue(&chan->data_q);
2724
6ed58ec5
VT		 2725 hci_send_frame(skb);
2726 hdev->le_last_tx = jiffies;
2727
2728 cnt--;
73d80deb
LAD		 2729 chan->sent++;
2730 chan->conn->sent++;
6ed58ec5
VT		 2731 }
2732 }
73d80deb 2733
6ed58ec5
VT		 2734 if (hdev->le_pkts)
2735 hdev->le_cnt = cnt;
2736 else
2737 hdev->acl_cnt = cnt;
02b20f0b
LAD		 2738
2739 if (cnt != tmp)
2740 hci_prio_recalculate(hdev, LE_LINK);
6ed58ec5
VT		 2741}
2742
3eff45ea 2743static void hci_tx_work(struct work_struct *work)
1da177e4 2744{
3eff45ea 2745 struct hci_dev *hdev = container_of(work, struct hci_dev, tx_work);
1da177e4
LT		 2746 struct sk_buff *skb;
2747
6ed58ec5
VT		 2748 BT_DBG("%s acl %d sco %d le %d", hdev->name, hdev->acl_cnt,
2749 hdev->sco_cnt, hdev->le_cnt);
1da177e4
LT		 2750
2751 /* Schedule queues and send stuff to HCI driver */
2752
2753 hci_sched_acl(hdev);
2754
2755 hci_sched_sco(hdev);
2756
b6a0dc82
MH		 2757 hci_sched_esco(hdev);
2758
6ed58ec5
VT		 2759 hci_sched_le(hdev);
2760
1da177e4
LT		 2761 /* Send next queued raw (unknown type) packet */
2762 while ((skb = skb_dequeue(&hdev->raw_q)))
2763 hci_send_frame(skb);
1da177e4
LT		 2764}
2765
25985edc 2766/* ----- HCI RX task (incoming data processing) ----- */
1da177e4
LT		 2767
2768/* ACL data packet */
2769static inline void hci_acldata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2770{
2771 struct hci_acl_hdr *hdr = (void *) skb->data;
2772 struct hci_conn *conn;
2773 __u16 handle, flags;
2774
2775 skb_pull(skb, HCI_ACL_HDR_SIZE);
2776
2777 handle = __le16_to_cpu(hdr->handle);
2778 flags = hci_flags(handle);
2779 handle = hci_handle(handle);
2780
2781 BT_DBG("%s len %d handle 0x%x flags 0x%x", hdev->name, skb->len, handle, flags);
2782
2783 hdev->stat.acl_rx++;
2784
2785 hci_dev_lock(hdev);
2786 conn = hci_conn_hash_lookup_handle(hdev, handle);
2787 hci_dev_unlock(hdev);
8e87d142 2788
1da177e4 2789 if (conn) {
65983fc7 2790 hci_conn_enter_active_mode(conn, BT_POWER_FORCE_ACTIVE_OFF);
04837f64 2791
1da177e4 2792 /* Send to upper protocol */
686ebf28
UF		 2793 l2cap_recv_acldata(conn, skb, flags);
2794 return;
1da177e4 2795 } else {
8e87d142 2796 BT_ERR("%s ACL packet for unknown connection handle %d",
1da177e4
LT		 2797 hdev->name, handle);
2798 }
2799
2800 kfree_skb(skb);
2801}
2802
2803/* SCO data packet */
2804static inline void hci_scodata_packet(struct hci_dev *hdev, struct sk_buff *skb)
2805{
2806 struct hci_sco_hdr *hdr = (void *) skb->data;
2807 struct hci_conn *conn;
2808 __u16 handle;
2809
2810 skb_pull(skb, HCI_SCO_HDR_SIZE);
2811
2812 handle = __le16_to_cpu(hdr->handle);
2813
2814 BT_DBG("%s len %d handle 0x%x", hdev->name, skb->len, handle);
2815
2816 hdev->stat.sco_rx++;
2817
2818 hci_dev_lock(hdev);
2819 conn = hci_conn_hash_lookup_handle(hdev, handle);
2820 hci_dev_unlock(hdev);
2821
2822 if (conn) {
1da177e4 2823 /* Send to upper protocol */
686ebf28
UF		 2824 sco_recv_scodata(conn, skb);
2825 return;
1da177e4 2826 } else {
8e87d142 2827 BT_ERR("%s SCO packet for unknown connection handle %d",
1da177e4
LT		 2828 hdev->name, handle);
2829 }
2830
2831 kfree_skb(skb);
2832}
2833
b78752cc 2834static void hci_rx_work(struct work_struct *work)
1da177e4 2835{
b78752cc 2836 struct hci_dev *hdev = container_of(work, struct hci_dev, rx_work);
1da177e4
LT		 2837 struct sk_buff *skb;
2838
2839 BT_DBG("%s", hdev->name);
2840
1da177e4 2841 while ((skb = skb_dequeue(&hdev->rx_q))) {
cd82e61c
MH		 2842 /* Send copy to monitor */
2843 hci_send_to_monitor(hdev, skb);
2844
1da177e4
LT		 2845 if (atomic_read(&hdev->promisc)) {
2846 /* Send copy to the sockets */
470fe1b5 2847 hci_send_to_sock(hdev, skb);
1da177e4
LT		 2848 }
2849
2850 if (test_bit(HCI_RAW, &hdev->flags)) {
2851 kfree_skb(skb);
2852 continue;
2853 }
2854
2855 if (test_bit(HCI_INIT, &hdev->flags)) {
2856 /* Don't process data packets in this states. */
0d48d939 2857 switch (bt_cb(skb)->pkt_type) {
1da177e4
LT		 2858 case HCI_ACLDATA_PKT:
2859 case HCI_SCODATA_PKT:
2860 kfree_skb(skb);
2861 continue;
3ff50b79 2862 }
1da177e4
LT		 2863 }
2864
2865 /* Process frame */
0d48d939 2866 switch (bt_cb(skb)->pkt_type) {
1da177e4 2867 case HCI_EVENT_PKT:
b78752cc 2868 BT_DBG("%s Event packet", hdev->name);
1da177e4
LT		 2869 hci_event_packet(hdev, skb);
2870 break;
2871
2872 case HCI_ACLDATA_PKT:
2873 BT_DBG("%s ACL data packet", hdev->name);
2874 hci_acldata_packet(hdev, skb);
2875 break;
2876
2877 case HCI_SCODATA_PKT:
2878 BT_DBG("%s SCO data packet", hdev->name);
2879 hci_scodata_packet(hdev, skb);
2880 break;
2881
2882 default:
2883 kfree_skb(skb);
2884 break;
2885 }
2886 }
1da177e4
LT		 2887}
2888
c347b765 2889static void hci_cmd_work(struct work_struct *work)
1da177e4 2890{
c347b765 2891 struct hci_dev *hdev = container_of(work, struct hci_dev, cmd_work);
1da177e4
LT		 2892 struct sk_buff *skb;
2893
2894 BT_DBG("%s cmd %d", hdev->name, atomic_read(&hdev->cmd_cnt));
2895
1da177e4 2896 /* Send queued commands */
5a08ecce
AE		 2897 if (atomic_read(&hdev->cmd_cnt)) {
2898 skb = skb_dequeue(&hdev->cmd_q);
2899 if (!skb)
2900 return;
2901
7585b97a 2902 kfree_skb(hdev->sent_cmd);
1da177e4 2903
70f23020
AE		 2904 hdev->sent_cmd = skb_clone(skb, GFP_ATOMIC);
2905 if (hdev->sent_cmd) {
1da177e4
LT		 2906 atomic_dec(&hdev->cmd_cnt);
2907 hci_send_frame(skb);
7bdb8a5c
SJ		 2908 if (test_bit(HCI_RESET, &hdev->flags))
2909 del_timer(&hdev->cmd_timer);
2910 else
2911 mod_timer(&hdev->cmd_timer,
6bd32326 2912 jiffies + msecs_to_jiffies(HCI_CMD_TIMEOUT));
1da177e4
LT		 2913 } else {
2914 skb_queue_head(&hdev->cmd_q, skb);
c347b765 2915 queue_work(hdev->workqueue, &hdev->cmd_work);
1da177e4
LT		 2916 }
2917 }
2918}
2519a1fc
AG		 2919
2920int hci_do_inquiry(struct hci_dev *hdev, u8 length)
2921{
2922 /* General inquiry access code (GIAC) */
2923 u8 lap[3] = { 0x33, 0x8b, 0x9e };
2924 struct hci_cp_inquiry cp;
2925
2926 BT_DBG("%s", hdev->name);
2927
2928 if (test_bit(HCI_INQUIRY, &hdev->flags))
2929 return -EINPROGRESS;
2930
4663262c
JH		 2931 inquiry_cache_flush(hdev);
2932
2519a1fc
AG		 2933 memset(&cp, 0, sizeof(cp));
2934 memcpy(&cp.lap, lap, sizeof(cp.lap));
2935 cp.length = length;
2936
2937 return hci_send_cmd(hdev, HCI_OP_INQUIRY, sizeof(cp), &cp);
2938}
023d5049
AG		 2939
2940int hci_cancel_inquiry(struct hci_dev *hdev)
2941{
2942 BT_DBG("%s", hdev->name);
2943
2944 if (!test_bit(HCI_INQUIRY, &hdev->flags))
7537e5c3 2945 return -EALREADY;
023d5049
AG		 2946
2947 return hci_send_cmd(hdev, HCI_OP_INQUIRY_CANCEL, 0, NULL);
2948}
kernel source for telekom puls (alcatel/mediatek)